10+ she does it willingly +1 forward

Simone gives you a big smile, "Really? You're the best Jeremy!"

You take the beautiful girl inside and show her all the prom traditions: bad group dances, slow dances, drinking punch, and sneaking **** which you're shocked to see Simone participate in. Hours later the two of you head to your car to go home.

Halfway to her house you look over at the bubbly, happy, slightly buzzed girl and say "There is one last prom tradition you should know."

"What's that?"

"The post-prom fucking."