Lots of taboo talk ;)
*Custom no names
You mom is one of the filthiest perverts you know and today she has arranged a 5 man gangbang for your sister.
Leaving her daughter alone in a room with 5 strange men she comes out to tell you the plan, she is so excited she masturbates whilst you are chatting.
Just like mommy you too are horny as fuck and decide to get down and dirty with mom whilst you listen to your sis getting absolutely fucking railed ;)