This story happened about 10 years ago when I was a senior in High School.

My dad had been dating his mid-30's GF for probably 6-8 months at this point. I wasn't a huge fan, but I'll give him credit, she was sexy. With that said, my dad decided to move into a new apartment and I was obviously tasked to help him move. His GF showed up with her sister, who I had never met and was recently divorced in her upper 20's. While not as sexy as his GF, the sister was still very attractive. Long, dark, and wavy brown hair. Killer smile. A body that was covered up in looser, modest clothing, so it was tough to really get an idea of her body, but it looked nice. I didn't think much of it as I was an 18 year old more focused on the task at hand than the women around me.

We worked throughout the day and the friendly, flirty, and crude banter increased more and more between the sister and myself. I have a very witty sense of humor and I'm not afraid to give you a hard time, but she totally matched this energy. It got more and more flirty throughout the day, but I still wasn't really focused on what was about to happen later that night...

Around 10 PM, we finished moving for the day, but we still had a lot more to complete the next day. For me, my night was wrapping up as I had a baseball game the following morning. My bedroom was one of the room's yet to be completed, so I created a bed on the floor of the living room and closed my eyes as the "adults" were having some drinks in the kitchen.

Around midnight, I could hear things were starting to wind down, but they were all hammered. I rolled back over and went to bed. Not even 15 minutes later, I hear giggling and the sister said she was going to sleep over since she was too drunk to drive home. My dad and the GF went upstairs and I all of a sudden felt this warmth snuggle in behind me. As someone who wasn't experienced at all beyond some casual makeouts and the occasional peek at a boob, my heart began to race. She put her arm around me and pulled me to face towards her. It was pitch black in the room, but I opened my eyes and saw her smiling and could tell she was very drunk.

She looked into my eyes and without saying a word, she began to kiss me. This was a passionate and intense makeout session. My head was racing and my cock was throbbing within seconds. I took my hands and explored her entire body. I knew her body was impressive, but never did I think it was this impressive. I grabbed the back of her head and pulled her into me tighter as my tongue swirls around hers. I pulled away and began to kiss her neck as I lifted her shirt. I unsnapped her bra and saw what had to be C-cup boobs with dark areolas. I immediately moved from her neck to sucking on her sweet, puffy nipples. I could hear her start to softly moan, but she was clearly trying to keep quiet.

I reach for her pussy, but she blocks my hand and says, "you're too young for me, we should stop." Like an idiot, I pulled away and obliged despite the look in her eye telling me she wants me so badly. We take a break for 15-20 seconds while she explains why I'm no good for her, but in the same moment, she places her hand over my shorts and grabs my rock hard cock and starts stroking it. I look at her and say, "Oh I'm no good for you? Sure doesn't seem that way." She responded with, "You aren't good for me, but I need you."

I immediately go back to sucking on her nipples as she squeezes my cock harder. About 2 minutes into this intense experience, without any warning noise, the light in the kitchen (attached to the living room) flicks on. With her nipple in my mouth, I look up and lock eyes with the GF (HER SISTER). As someone I genuinely hate, I don't even hesitate to slowly detach from her nipple and give a big smile as the sister immediately covers up in embarrassment. The GF turned as white as a ghost and immediately turned the light off and without a word ran upstairs back to her bedroom. I was as turned on as ever at this point as I immediately grabbed the inside part of the sister's thighs and could feel how wet her pussy was through her panties. I started to rub her pussy for 5-10 seconds before the pulled away and said, "I really like you and I want you so badly, but I just know this is wrong." I then spent the next 10 minutes trying to talk her out of that decision, but it was too late... Despite many efforts, she turned over, asked me to cuddle her, and we both fell asleep - with the worst blue balls of all time.

I woke up the next morning and we all had breakfast together. My dad asked how I slept and I told him, "man last night was a great night" as I smirked towards to the GF. The day went on as if nothing had happened, but I did receive a text message from the sister explaining she didn't want anything serious and while she would love to mess around with me, I'm just too young. Oh well, it was fun while it lasted.