Your sister just got home from a gangbang and she's cum covered and makeup smeared. She gets in bed and you (her little brother) sneak into the room to get a little nookie yourself. She thinks you are just another party going guy from the gangbang so she let's things happen. Then she realizes that you are her little brother! She freaks out at first but she's such a dumb slut she decides to keep going with it and ends up begging for a big facial from her brother. Lots of dirty talk was a custom