Virgin Step-Sister Wanted to Have Sex

My step sister has never had sex with a man. She didn’t want to be a slut. For being his half-brother, to me; Do you want to fuck your sister? Said. There was no other answer to this question, and I opened my penis and began to thrust it into his tiny mouth. My sister, that is, my sister, was not bothered by it at all. Despite being a virgin, she can compress her lips very well and has a better orgasm with plenty of saliva.