Safe Bet (Zack/Tifa)
Fandom: Final Fantasy VII
Warnings: Vague references to sex.
Prompt/challenge you're answering: Tifa owes Zack, and uses sex as an alternative form of payment
Note: This is very sappy. I blame Cloud, as he kept trying to turn all my attempts at smut into a threesome. It wasn't until I tried a different take that he agreed to mind his own business.