Cloud and Tifa were childhood sweethearts that parted amicably, so when he saw her having fun with his sworn brother, Cloud had no problem. The same couldn't be said about Zack and Aerith, since she was ghosted after giving away her heart. When she saw Zack flirting with Tifa, she tried to make him jealous by also flirting with Cloud. Zack wasn't the only one affected though, since Aerith also caught Tifa's eye. - #FinalFantasyVII #Cloud #Tifa #Aerith #Zack