The owner of the store is not only a big institution, but also a mighty trunk, that even the blonde's willy seems to crack, and judging by her moans, it feels very hot. It might not be the first time she got laid, since the girl's behavior is free and she came to visit with pleasure.
And why would the grandfather resist? When else would he have such an opportunity. Besides, it's always easier with a temperamental woman - she gets herself turned on and therefore comes much faster. You would have tried to bring to orgasm phlegmatic fat girl with a huge hollow. That's the kind of woman you should run away from. I've been in the middle of one of those, you can't wish it on the enemy.
What's the girl's name?