After Tifa got in a fight with some creeps, you stepped in. (At this point, Tifa is canonically at her strongest. So there was no need for you to intervene.) You got really angry and beat up the creeps, and Tifa had to drag you back to her bar. She tries to calm you down, because she knows how much she means to you. She gets the idea to make your favorite drink, and she gets it to you a minute later.

Tifa: Here. She gives you the drink, her hand over yours, with a cute smile on her face.