Wow, didn't expect this reception to the first story. Thank you all for your support, I'm glad you all enjoyed it so much. Keeping the same name of the story, although It’s a different scenario. Although there is a similarity at one point.

As I ended the last one, nothing happened again with my sister-in-law for a very long time. Outside of some stares and light flirting, we kept things pretty PG. That didn't mean that I stopped thinking about it or that I wanted her any less, simply the situation never presented itself again and I didn't want to go out of my way to make something happen. The organic way the first one did felt right and if anything were to ever happen again, I wanted it to be the same.

So anyway, Ali had just graduated with her Masters in Accounting. We kind of teased her for how long she was in school, changing her major more than once before deciding on Accounting, then doing her Masters after that. But she did it, and was going to move to the Metro after graduation for an internship she had lined up. The only issue was, her apartment wouldn't be available for 2 weeks after her current lease expired. Which meant that she needed somewhere to stay for the time being. I'll never forget when Kate came up to me and asked me if I would mind if Ali stayed with us for the 2 weeks while her apartment became available. I instantly felt butterflies in my stomach, the feelings of that night all coming back to me in an instant.

"Yeah, that's fine, I don't see why not" I replied nonchalantly

Not trying to sound excited about it at all. There were still a couple of weeks before she would move in and those weeks leading up to it were torture. It was all I could think about. Kate and I had a kid by this point, and our sex life was pretty much non-existent at the time. Like I needed the added sexual frustration at the time.

Moving along, the day came of Ali moving in. At the time, we lived in a 3-bedroom house. All 3 rooms were upstairs with a small loft in the middle of all of them where we watched movies at night before bed. This detail is pertinent later on.

(Oh, a couple of you messaged me asking me more of what Ali looked like. She's on the taller end for a girl, about 5'8". Curvy but not fat, with a huge butt like I said, blondish brownish hair, green eyes, cute C cups. Admittedly, Kate is far better looking than her in my opinion, but the added forbidden element bumps her up a few notches)

Back to the story. Having a 1 year old at home meant that our life was pretty boring. It consisted mostly of hanging out at home, usually watching a show or movie before bed. I also worked from home, so I pretty much spent all day at home.

The first couple of nights were very generic. Nothing special about them outside of Ali and her sexy pajamas again. That hadn't changed. Still loved wearing very loose fitting shorts to bed and this time mostly wore a sports bra. Our bedtime routine consisted of me putting the baby down to sleep while Kate took a shower. It only took me about 10 minutes to get her down and it took Kate a good 30 minutes if not more to finish her nighttime routine before being ready to watch a movie. This meant that I got to spend about 30 minutes or so with Ali alone on the couch.

While nothing happened the first few nights, there was an obvious tension between us for those short moments. On the 4th night, Ali finally made her first "move". I had just got done with the baby, when I stepped out to the loft I noticed her laying on her stomach on the floor. Her perfect ass on display.

"Hey Mike, my back has been really bugging me lately, would you mind popping my back?" She asked innocently.

I stared at her ass for a second longer before replying to her,

"Sure, you just want me to crack your back like that..like push down on it?" I asked, sounding like an idiot. Unsure how to ask if I was supposed to straddle her or not.

"Yeah, have you never popped someone's back before?" she teased at me.

'whatever' I thought to myself, and just went for it. Sitting right on her ass. I slowly rubbed her back at first. Taking my time with it as it was the first intimate contact we'd had in years.

"Ready?" I asked.

"Mhhmm" she whimpered, almost with a moan in her tone.

"Take a deep breath" I instructed her, before pushing down on her and cracking her back. She let out another sexy moan as I did it, that was enough to start to get my cock going. Not trying to be weird, though, I got off of her right after. She thanked me for it and told me that felt great. That was it for that night.

The very next night, it was the same thing again. Immediately after I came out, she asked me again.

"Mm Mike, do you mind popping my back again, it felt so much better after you did so yesterday."

By this point I started to suspect that it wasn't just an innocent back pop for her. It was at the bare minimum her attempt at flirting with me. And I loved it.

"Sure, same way as yesterday?" I asked.

She nodded and laid back on the floor. It's hard for me to describe just how nice her ass is, and her laying on her stomach shows it off so well.

I straddled her again, this time, pressing my cock just slightly over her ass as I mounted her. She didn't say anything about it but I was sure she felt it based on a little grin I caught with her face turned sideways. Funny enough, I was wearing the same gray shorts from the first night. An old pair of college shorts I had that were super worn out now, the area of my cock nearly see through now from how worn they were. Kate had pleaded with me to throw them away but they were my favorite shorts so I never did. That was the end of things again that night.

The next night, things finally got a little spicier. In a pretty bold and shocking way. She didn't ask for her back pop this time. I was sad about it, as we just sat around and small talked, waiting for Kate to join us. Once she did, we put on Friends, as no movies looked good. After a little while, Ali started to complain about her back to both of us. Telling us that it had really been hurting lately. I smiled a little thinking of our little back cracks. Then, she just straight up asked me in front of Kate if I minded giving her a back massage. Not a back crack. A massage.

"uhh.." I stuttered for a second.

I looked over at Kate and she seemed completely unfazed by her request.

"Sure..." I said, "I don't mind"

"Ah, great" she replied, instantly getting up off the couch and laying down on the floor. We had an L couch, and she laid down next to the L if that makes sense. Kate was sitting on the other side so the couch was pretty much hiding her underneath.

"I'll go get some coconut oil, be right back" I said,

Walking into the bathroom. Trying to keep cool. I grabbed a jar of coconut oil and headed back to the loft. Ali was wearing her same sexy shorts but this time a t shirt with a sports bra underneath. She didn't take it off either, which led to a short awkward moment.

"Oh, did you want coconut oil, or did you just want me to massage over your shirt?" I asked.

"The coconut oil sounds great" She replied.

"Ok...." I said, wondering if she just wanted me to lift her shirt up or something. She caught on with my reply.

"Oh sorry, did you want me to take my shirt off?" She asked.

I looked up at Kate and she looked at me with a smile, I made a face to her like I didn't know what was going on and she just kind of laughed.

"I mean, it might be a little easier, unless you want me to get it all over your shirt." I said.

"You're right" she replied.

Sitting up and lifting her shirt over her head. Her sports bra had clips in the back, unlike traditional ones. She left it clipped on though. I knelt beside her, not bold enough to straddle her with my wife right there. It wasn't the easiest way to massage someone's back but I got started. I got plenty of oil on my hands and rubbed them together to warm them up. I started massaging her shoulders first, and her upper back. She let out small moans when I added pressure, quiet enough so only I could hear them. I moved on to her lower back, and she really liked this. I would push down, applying pressure all the way down, just before her butt. The clip of her bra was really making things challenging for me, though, so without even asking, I unclipped it. She didn't say a word, and I knew Kate couldn't even see it from her angle. I know it was just her back, but seeing her body exposed like that, with her butt right next to it was enough to get me hard. Luckily, Kate couldn't see that either. I kept massaging her back for a little longer before making my first move. I climbed over her to get to the other side, but this time, quite intentionally pressed my hard cock right on her ass as I switched sides. It felt so good, and her small moan when I did it had me absolutely reeling at this point. I wanted her so badly. I kept pushing the limit and started to massage down her sides a little more. Each time getting closer to her tits, getting a great side boob feel. I could tell she was enjoying it as much as I was based on her occasional smiles and moans she let out throughout.

I loved her tits but it was her ass I was obsessed with. I wanted to see how close I could get to feeling it. I went back to her lower back and pushed my hands just underneath her shorts. Slipping right under the band of her panties. Not wanting to be too bold, but getting a nice feel of the top of her butt. I stayed there for what felt like forever. Literally so long that Kate suddenly interrupted.

"Jeez, don't think I've ever gotten a massage for that long!" In a joking but somewhat serious tone.

I just laughed nervously.

"Oh haha, sorry, I figured she would tell me when to stop" I replied.

"Who tells someone to stop massaging them? She replied, "You could massage me all night and I wouldn't complain" she said. It sounds more sexual typing it out than the way she said it, but it was still pretty hot of her to say. She grabbed her t shirt and put it back on, somehow avoiding Kate seeing her sportsbra unclipped and headed over to her room. She came out a few minutes later in a robe,

"I think I'm going to take a quick shower and go to bed" she said. I couldn't help but think that she needed to relive herself after the long massage.

"Sounds good" Kate replied to her.

I washed my hands and laid back on the couch. My mind racing, trying to imagine her in the shower playing with herself. A little later she came out, back in her robe, said goodnight and went into her room. Kate and I stayed on the couch a little longer before she started to doze off too.

"Im ready for bed too I think" she said.

I let her know that I was going to stay up and 'do some work' before bed. Which wasn't uncommon for me to do, she said ok and headed to bed. We always sleep with the bedroom door closed, so she closed it. I sat on the couch alone now, with Kate and Ali on the same level, both a room away. I was so horny, there was no way I could sleep without jerking off. I grabbed my laptop and a pair of headphones and laid down on the L of the couch. I decided I was going to jerk off. With the plan that if Kate came out for whatever reason, I would just say I thought they were all alseep. And obvisouly hoping that Ali would come out for some reason. I was bold, and took my shorts completely off and began to jerk off. I had a blanket nearby me but I was fully exposed. In the back of my mind I was actually shiting myself at the idea of Ali coming out. Like, would I cover up if she did, or just proudly lay there. I didn't know how I would actually react.

Well, it didn't take long for me to find out. I was really feeling a scene and was actually getting close, I closed my eyes for a second, enjoying the moment when I suddenly heard a door pop open. In the moment I didn't know if it was Kate or Ali and I honestly freaked out. Immediately reaching for the blanket and covering up. The laptop falling over, it was a mess. It was Ali. She froze by the door, staring at me in the midst of my crisis. She then started to laugh. I pulled the blanket over me and shut the laptop, laughing back at her wtih a stupid look on my face.

"You alright there?" she asked still laughing.

"Yes! Sorry, I ah... I was.. sorry" I just said.

"Why are you sorry?" she asked

I just paused, staring at her. Struggling to find the words for a response.

"Oh umm, I don't know. Didn't expect anyone to come out.." I said.

She leaned against the wall for a second, a devious look on her face. Not saying anything, just staring at me, finally breaking the silence.

"Well, no need to apologize.." she said, as she slipped into the bathroom.

She closed the door behind her, and I was stuck not sure what to do next. Part of me wanted to just pull the blanket off and continue to where I was, knowning she likely wouldn't mind but for some reason I was scared. Kate was so close next door, and it was just a lot riskier than the first scenario. Life isn't a porno unfortunately so I had to be smart about it. I decided to keep the blanket over me but opened my laptop back up. It was facing away from her, but I was sure she knew what was on it.

I did my best to listen, but I never heard her pee or anything. I heard the sink run for a little then silence for a bit. My guess what she just came out to see if I was doing anything but I wasn't sure still. After what felt like an eternity she came out. Not walking out fully, standing right by the door. Maybe 10 feet away from me. She stared over at me,

"Well, what are you up too now?" She asked with a grin on her face.

I wasn't about to confess,

"Not much... just hanging out.."

She didnt say anything back. I could tell she was having a battle in her head, like she wanted to say something so badly but couldn't spit it out.

"Mmm... well... I guess you have fun with that..." she said, as she headed towards her room.

My heart sunk. I wanted something to happen so badly but I didn't know how in that moment.

"Umm.. well...Goodnight.." I said, with a very sad tone. Hoping she'd catch on and say something more.

She looked back over to me, the same look on her face,

"Goodnight.." and closed the door behind her.

I put my hands over my face, mad I didn't have the courage to say something more. Suddenly, I had an idea. I grabbed my phone and opened up Instagram to see if she was online. My heart started pounding when I saw the little green light on. I clicked on her profile and clicked message. I wanted to say somtething to her so badly, but I didn't know how to start it. Well my heart nearly beat out of my chest when I suddenly saw the typing emoji coming from her to me. I felt like I held my breath forever, waiting to see what she would say. Then it went away. I started to type something just so it would show her that I was typing too, then deleted it too. After a bit hers started again, god I was being such a pussy and just wanted her to make the first move so badly. Finally. I got something. It was the monkey emoji with It’s eyes covered. It wasn't much but it was all I needed to get things started.

I replied with the sweating face emoji. She then said,

"Sorry, I realized it was me that should have apologized for walking in on you.."

"It wasn't your fault, I was the one in the loft.. I should have gone to my room..." I replied.

"Yeah... or just taken a shower like I did..."

I nearly fainted. She was confessing to playing with herself in the shower like I had suspected.

"I was wondering if that's why you took a shower..." I replied.

"Yeah... maybe if you weren't so good at giving massages I wouldn't have had too.."

My cock was rock hard again, I was dying with excitement but wanted to play it cool.

"Is that a complaint?" I asked.

"Absolutely not...." she said.

Before I could type out a response, she messaged again.

"Well... you have fun wtih that tonight..there may or may not be a little gift for you in the bathroom if you want to check...Goodnight.." with a kissy face.

(Now, something I've failed to mention so far was my obsession with her panties. Pretty much everytime she comes over and stays the night I go out of my way to find her panties. I've even jerked off on them a few times before, not completeley filling them up, just a little bit of cum on them. I have never thought that she actually knew I did this, as they were always her used ones, but I was never sure.)

My heart was pounding out of my chest when I read that. I instantly got up and went into the bathroom. Laying on the floor were her panties. The same ones she was wearing during the massage I gave her. I couldn't belive it. I picked them up and looked at them and they were absolutely covered in grool. I took a long inhale of them and they smelled incredible. The fact that she had left them for me was about the sexiest thing I could have ever imagined. Now her bathroom trip made sense..

I took them back to the couch with me and simply replied,

"Fuck...."

"Enjoy ;)" she replied.

I placed them by my face and jerked off. The scent of her was intoxicating and I felt like I was going to cum any second with just the scent of her alone. Just before I came I wrapped them around the head of my cock and released my entire load into them. The soft fabric of them felt amazing on my head and the idea that she wanted me to do that made it 100x hotter. My oragasm winded down and I sat there, contemplating where I would leave them. I didn't want Kate to accidentally find them if she went into the bathroom in the morning. I decided to slide them underneath her door. Tip Toeing towards her room, I wedged them under. I knew nothing more would happen that night so I put my shorts back on and headed to bed.

​

I realized that this story is very long already. I'm going to break it into 3 parts instead. Sorry if this one was sort of anti-climatic, but hope you enjoyed it still!