CAWD-601 Living Together for One Week After Mother's Remarriage... Couldn't Control My Arousal at My Sloppy Sister's Defenseless Plump Ass, Creampied from Behind — 有栖舞衣

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Everything changed suddenly when my mother remarried and I had to start living with my new stepfather and stepsister. When Mai first saw me she was stunned. “A little brother? I didn't hear we'd get one — I thought he'd be about a ●-schoolboy.” Maybe she felt uneasy about living with such a big brother. I felt a little guilty. But after a week she seemed to have gotten used to living together, and my sister started wandering around the house in loungewear that barely covered her underwear, her large ass practically spilling out. “Don't stare. This is my home — what I wear is my business, okay?” No — when she dresses that provocatively I can't help it! I got an involuntary erection at her careless, sloppy butt and rushed back to my room to masturbate. My sister, oblivious to my situation, kept showing off her sexy butt every day. One time she fell asleep on the living-room sofa with her butt exposed… I couldn't help myself and touched her big butt… so soft… dangerous, I might get addicted… I groped it desperately and she woke up. “Hey, what are you doing? Stop… we're siblings, you know?” I know that… but my reason had already been blown away… Sorry, Mom! But I couldn't back out now!! I buried my face in that soft butt flesh, rubbed my crotch against the cleft, and then plunged in from behind… Oh God… the way that butt flesh rippled was irresistible… It felt so good I pounded wildly! Without thinking about consequences I shot thick semen deep into my sister's vagina… I'd done it… incest… family destroyed… The next day she acted as if nothing had happened. She didn't tell our parents… did she not hate it? Emboldened, I started sneaking around and chasing after her butt whenever I could…