I went to a party with my sister and we got wasted. She walked in on me buttfucking some random guy. She watched the whole time. She thought it was hot so she sucked the guys dick and fingered his asshole. She had my cum on her fingers and licked them while looking at me.

At this point, my trans friend was in the room and started sucking my dick. She looked at my sister and said they should switch. My sister put that trans cock in this guys butthole and then started sucking my dick. Right as i told my sis i was gonna cum, she stopped and made me fuck her doggy.

My trans friend kept fucking the little gay guy saying "youre a sister fucker"

I cam in my sisters pussy and she fingeres herself while my trans friend sucked my dick.

The next day my sister was so embarrased but her and my trans friend fuck on the regular. Sometimes i fuck my trans friend and she asks if she smells like my sisters pussy. She told me that she likes knowing my sister has tasted her brothers cum.