At Slughorn's party, Hermione asked you to pretend to be her Partner. Just to make Ron jealous

You agreed, and everyone believed that you were a couple. Since both were supposedly a couple. Everyone demanded that both of you should kiss

"I-it's just a kiss... it is nothing ... just a small peck" she said nervously and you agreed. And both of you kissed.

You both thought that it was going to be a short and simple kiss, but more time had passed than you both thought...