They are just 2 people in love, simple as that.

Young girls always like older guys, was the same in the 80's when I was younger.

And when guys get into their 20's / 30's, I'm sure they find it quite flattering when a younger piece of stuff wants you.

Let's see now, old hag of a Wife in her jeans and slops sat next to you or a pretty younger girl up for anything you like, hard one that!