Daddy sure is quick - got in and fucked his daughters like whores. But then again - he's responsible for their upbringing, so he's entitled to it. They even observe the line to get their pussy in. Sluts need society, too, and he can teach them to be their best. And I think - he's succeeded. I see they deftly worked his cock and even enjoyed it when he cummed in their open mouths.
Sister's got a lot of nerve - first she pees on the toilet in front of her brother, then she strips naked and gets in the shower. But my brother is not a toothbrush - he sees everything and when his sister does that he gets a hard-on. And if he hadn't just jerked her off and walked away, no, she started seducing him. Even if that bitch is your sister, you can still fuck her, because everybody fucks her. What's worse than you? Whoever's closer to the body should get her wet lips more often.