Your Father has not been able to satisfy your mother for many years due to a chronic illness. your father is happy for your mother to find sexual release elsewhere, but your mother is not happy to be with strangers. Your father has been doing research about the legalities of keeping sex in the family. Your parents turn to you to deal with your mothers needs. Your mother is very embarrassed about asking you, but it's immediately obvious that this is something you've wanted to do for a long time. Your mum invites you on a date. You're both excited and nervous. You surprise your mum with the fact that you were able to cum 3 times in a row, once in her pussy, once in her butthole and once in her mouth. You both love your dad's new family plan.