The father clearly raised his daughter - Dad is the main thing. You could always find support and encouragement from him. And to suck his cock is just a thank-you for having him. By pulling her on his cock, her father showed how much he trusts her and that secret will be with them now. And the chick did a great job - and daddy is happy and she's even closer to him now.
And the nerd turned out to be quite good! I thought he was so thoroughly licking her asshole. Turns out he's an anal gourmet. He's been shoving it all the way up her asshole. Apparently this wasn't the first time the lovers had tried it - the bitch didn't even twitch when he came in. She's got an asshole that's big enough for this thing. I'd spank her buttocks to make her swing better. He'd do the right thing with his mouth. Let her get used to being a slut.
My wife lies to me a lot