No True Pair

Title: Safe Bet
Author/Artist: sekiharatae
Fandom: Final Fantasy VII
Pairing/characters: Zack/Tifa
Rating: T
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.