((Hi! So this one is a bit tame but that's only because it'd part 1, I thought a slower paced series would be more fun to see someone get more extreme 🥰🥰 ofc if you arent fans let me know and I'll stop at 1 🖤))

Lisa had been getting close with Robin, they'd been dating for a few months and now that her time at university was over, she was headed over to see him. She had to beg her best friend to borrow her car, which came at the cost of an unsavoury favour, but that bridge could be crossed when it came up.

The drive was long and tiring but she eventually got there. Getting out groggily, the heat hitting her was a stark constrast from the air conditioning. She knew it'd be hot, but this was far too much, she was wearing black leggings for God's sake! Sweating as she made it to his door with her stuff, and pressed the bell.

The ring was heard through the house, and all was quiet. Lisa rang it again until she heard a faint voice through the door. "H-hello?" They said meekly.

Jolting a bit from the shock she tried to peek into Robin's home. "Hey! It's Lisa, you all good?"

"O-oh!" There was a fumbling with the lock as a smaller version of Robin was before her, grinning up at her. "Hi Lisa! Robin told me to wait for you!" Taking a second to take her in, she was gorgeous. Long black hair, full lips, big doe eyes, and a slim-thick figure.

Lisa took a second, staring at Robin's younger brother, she really couldn't remember his name. "Haha, it- it's you! Oh, wow. Robin, has indeed- he's mentioned you!"

Smiling awkwardly, she kept sweating in the heat as his younger brother narrowed his eyes. Seeing through her pathetic bluster. "Yeah, okay." His expression was now flat, as he stood to the side to let her in.

"It's a lovely place, wh- is Robin in?" She asked while kicking off her shoes in the doorway.

"No, he's headed out. Our grandpa had a fall so he's trying to look after him." His face was still stoic, any amount of respect he held, was now gone.

Trying to look concerned, she checked her phone. "He didn't say anything about it..."

"He was in a rush Lisa."

"Oh, yeah. I'll just drop him a text and find out, I hope he's oka-"

"You can just go to his room." He slowly lumbered up the stairs, before wandering off.

Lisa, watched him walk off, smirking as she thought how similar he was to Robin. Just shorter and cuter. She wanted to cuddle him, but honestly it would be inappropriate.

Placing her stuff down in Robin's room, she splayed out on the bed. She was still roasting. Checking to doorway to see it empty, she began stripping. Her hoodie was thrown into a crumpled heap as she stood in her peach bra, showing off her perky tits. Standing and wiggling to peel off her leggings, her matching peach panties now on show.

Lisa checked the door to see it empty again as her hands wandered down her sweaty body. His little brother was just too cute, she just wanted to pull him close and feel him quiver. I bet her would welp, she giggled to herself. And before she even realised, she was feeling herself. A warmth flashed over her as her fantasy deepened, and before she could stop herself she was moaning quietly on the bed.

Arching and moaning, her eyes shot to the doorway, showing Robin's little brother. Letting out a gasp of genuine surprise she pulled her hands free.

"I- I- Sorry....." He said, a full blush over his face.

Lisa tried a smile but it turned into a smirk as she noticed a fair bulge in his shorts. Standing up, and walking over, he seemed to shrink at her approach. Cupping her hands over his shorts, she leaned into his ear and whispered. "Is this for me?"

He yelped as she touched him, staring up with big eyes as Lisa kept a firm grasp. "Wh-what, what are you doing? R-Robin would kill me."

Shaking her head slowly, she kept stoking over his shorts. "He never has to know.... Let Big Sister take care of you."

Blushing darker, he only nodded in response as Lisa began to unbutton his shorts. Letting them drop, she reached into his boxers. Feeling him pulse and twitch in her grasp.

Giggling as he avoided her eyes, Lisa began to pump it slowly. "You're bigger than I thought.... Perhaps my hands, won't do...."

He kept growing in her tender grasp, much to Lisa's surprise, it felt as if he was larger than Robin. Still excited from playing with herself earlier, she grasped his hand and placed it within her panties. "Don't be shy lil bro~"

"I-I've never done this-" His fingers moved awkwardly, fingernails digging in more than Lisa would have hoped. She held composure but soon decided to scrap that plan.

"As if you don't know-" Freeing her hands from his member, she slid off her panties and took off her bra. "I bet you've seen plenty of porn, just act it out~"

He nodded, still bright red at his older brother's girlfriend now fully naked before him. Thinking back to his laptop, he kept nodding, fully erect. "J-just act out the porn I see?"

"Yeah~ don't be shy, I can take it." Bending over slightly to be at his height, she kissed his forehead. "You afraid or someth-"

A slap rang out. Lisa's cheek now bright red, let out a small giggle. This only prompted another slap, and another, and another, and another. This kept going as Lisa began to stumble away from the onslaught. Why was she letting him hit her? She could easily defend herself against him, but she wasn't? Was she liking this?

Falling over, she looked up with her big brown eyes, her cheek was bruised as he placed his cock infront of her face. Lisa happily accepted, opening her mouth greedily and swallowing half. It was certainly bigger than Robin's, she thought.

"G-good slut." He said awkwardly, but his movements were nothing but competent. Grabbing a handful of her black hair, he pulled at her roots as he forced his way into her throat.

"Glurk- Guh" Could be heard coming from the older girl as she was willingly being assaulted. Held in place firmly by his small grasp. Choking helplessly as he continued to force his way down, this was the biggest cock that she ever had. Her jaw was aching and her throat was begging to feel sore already.

Lisa was beginning to feel more and more excited, she tried to pull free for a gasp of fresh air, but was held in place.

"N-no." He said coldly, and began thrusting brutally, jamming into her throat, over and over. Slumping onto her knees a bit to power through, his grip tightened as her hair got pulled harder.

Guttural sounds echoed from the older girl, stuck on her knees with a bruised face. Lisa was tapping his hand desperately, her chocolate eyes brimming with tears, she just wanted a breather. Her eyes began rolling backwards, as she began to feel faint. But he didn't relent, still forcing her throat to stretch as he pumped nonstop.

Her head became light as she remained slumped, hand falling down as she couldn't keep it up. The desperation was clear on Lisa as she felt weaker and weaker, trying to pull away. She was being completely overpowered by a small boy. Her vision blurred as she tried to meet his eyes, everything fading as she went faint. Shuddering as everything went to black, the steady dripping from her pussy was a clear sign of her near-fatal lust.

Lisa awoke, naked on the floor with the taste of sweet cum lingering on her tongue. Groggily getting to her feet, she saw the thick ropes of cum covering her skin and the deep bruise from the abuse. How was she going to explain this?

After a shower and freshening up, she took her previous clothes and rubbed them in some dirt outside. Easily fabricating the story that she got attacked when she stopped for some fuel. Robin was understandably furious when he heard of it, but his little brother didn't seem to care all too much.

Their grandfather was still in care, so Robin explained it might be an awkward time since he wanted to keep visiting. Lisa took no issue saying she understood and would wait here. Assuringly to Robin, it seemed his little brother had taken a shine to Lisa. He usually kept to himself but seemed happy to be with her, so he took no issue with her staying at the house.

Lisa and Robin fucked in the night, the boring vanilla becoming crystal clear. She had to think back to being defiled by his little brother to even cum. This wasn't healthy, but she loved it so much. Making it through the mercifully short session, she lay awake on the bed thinking back. Wondering what they would get up to tomorrow.