The way I see it, the chick isn't particularly attractive. Belly in ugly folds, stretch marks on her thighs, lopsided ass. Except her breasts are attractive. I can't tell you how it is in the front, but you can see how fucked up her anus is. So realistically, the lady's working mouth is kind of attractive, nothing more!
What does a girl do at her grandfather's house - read books from his library? No, she wants to be entertained, not page-turning. Her hormones are running wild and they need an outlet. Well, since her grandfather has nothing better to offer, she'll do it herself. Or rather, his cock. And although the grandfather was surprised by her desire, but for his own granddaughter nothing is worth it! So it was a matter of honor to work her hole. So he had to work up a sweat. But she took his warm drink in her mouth with pleasure. Now it will be much more pleasant to see her grandfather. )))