おっと！私の義理の妹は、家族旅行中に「偶然」私のペニスに座っていました

I had to share a bed with my stepsister on the family vacation trip. I didn't expect her to sleep without underwear! In the morning she woke up to admire the view while I admired her naked ass and masturbated while watching her. She accidentally sat on my erect cock and we ended up fucking until I came on her beautiful round ass.