You mowed the lawn, it actually took little effort to do. Sure you still need to push it, but you were able to cut every grass on every inch in great accuracy and detail. 

Meanwhile, Jenna sits on a plastic chair chugging those Monster cans up. Once finished mowing she stood up.

"Hey, thanks for helping." She cheered, slapping your back. She has quite the strength that it kind of hurt your back a bit. "Y'know you're a pretty good looking kid, how old are you?"

You responded around your 20s.

"Goddamn, if you're born on my generation I would've dated a kid like you. You even mowed the lawn better than lil' ol' me." She pats your back, and then your head. "Kind of shorter though, but well, I like short men."

You never mowed the lawn before, so it was the first time after all. You never get a compliment like that from an authority figure as well, so you're beamed with joy right now.

Jenna rolled her arms around your neck, "Ey, I tell you what? I'm in a pretty good mood right now. You did me a favor, so I'll do one for you, what do you want?"