Nice way the grandpas got their dicks in her pussy. She may not have counted on such a vigor, but the fellows were old school - pawed at her like young horses. And the honorable thing was that they didn't forget her ass. That's who wouldn't ruin a furrow. They got positive emotions from the girl and went to play dominoes. With that kind of energy, you could be playing with chicks till you're 100 years old. One stick adds a year to life!
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.
Why would you do that?