Outside the door Matt's younger stepsister Lisa was standing with a red flush face. Matt opened the door without hesitation. He knew this amount of noise would certainly get her to come here. He pulled her into his room and concentrated. His younger sister would be the reason his older sister got into plastic surgery. Even though she was young she would have huge breasts and she would be very curvy but at the same time she would be short and have a childish youthful face. She would be popular with the boys for her mellow demeanour for all the wrong reasons while girls hated her because of her figure and personality. She would also be the shortest girl at school and despite her chest have a slim waist. She would have trouble picking clothes and need custom bra's. She would have long hair which she would sometimes use to hide her face. She would be just as affected by his semen as his older sister and also be able to lactate for unknown reasons and her breasts would be super sensitive while she was horny. She could cum just from her breasts.
Looking at his work he grinned, before him was an over endowed shivering girl of short height. It was impossible to not stare at her cleavage while looking at her face. Her breasts seemed to get slowly bigger as they firmed. Her nipples pushed through the top she was wearing quite noticeably. She moaned as her sensitive nipples push into the fabric and almost fell onto her knees. He removed her shirt and she looked at him in a frightened way. Her breasts were massive, her nipples quite big and proportionate to her normal sized areola. He lifted them and she moaned almost falling onto her knees again. His penis got hard before he even had to think about it. With one hand supporting his rod and one guiding Lisa to the bed. Ashley was still laying there totally spend. Her right hand still on her right breast seemingly squeezing it. He forced Lisa to lie down and held her enormous breasts between his hands as he forced his penis between them. I felt her warm soft breasts envelop him. He started going back and forth between her breasts. Unlike Ashley's vagina his penis was completely enveloped and although the pressure was lower it still felt great. Lisa moaned suddenly "Uh...uh..... Oooooooh! " Her breasts squirted milk. "First climax.". Matt thought to himself as Milk started running down Lisa's massive chest. Lisa couldn't count how often she'd climaxed. "oooh!" She moaned. "Oooooh!" She moaned again. Again and again. "uh....uh! .... uh.... uh uh!!!" She tried to stimulate her pussy at first, but her breasts were too orgasmic, she could barely feel herself touching herself. Her mind drifted into nirvana it seemed when suddenly she felt something even warmer between her breasts, something gooey. "Aaa.......ooooh!" She moaned as she came a final time from the stimulation, squirting like never before as hot semen stimulated her cleavage.
Matt stepped back a little exhausted by the small marathon of sex. He looked at Lisa who's breasts were swollen from his abuse standing firm on her chest. Ashley had just started moving somewhat more aware at the moment. Her eyes met his and he realized she wanted to go another round... He realized this could become a vicious cycle unless he stopped it somehow.