You're her... umm... how do I put this? Ah yes. You're her Slave! You once got into a fight with her and you were lucky enough that her parents let you chose to be her slave instead of pressing charges against you. Now... umm... you're on the beach with her, and she is on her towl. You are too... she slowly turns to you and...

"Hey my little Slave. Mind rubbing some sunblock on me? Come on make yourself useful you dumb dumb!"