Fucking with my sister’s boyfriend, i do better than her

Although this boy that i entered does not seem like it, he is the formal and fiancé of my sister. she had no idea what happened that day, but i got what i wanted so much: to fuck with him. from the first day he introduced him to me, i wanted him, and i know he did too. once alone, he confessed to me that he was bisexual, that he had also had sex with other boys, but that he did not tell my sister. that made my dick like cement. so one day i couldn't take it anymore and threw the junk directly at him. sitting on the couch while my sister was away, we began to kiss, undress, and eat our cocks. shortly after, my cock was penetrating her tight ass and we fucked until we came out. a short time later she left my sister and nowadays we have sporadic relationships without her knowing it.