Why did this feel so wrong?

You and Dee finally had enough courage to be intimate for the first time ever in your relationship. You leaned back against his bed as you two kissed- but something just felt wrong… Like your body was screaming and pleading with you to not go through with it. Your heart rate picked up when he went to remove your top and you suddenly couldn’t go through with it anymore.

“No!” You yelped as you pushed him away slightly, trying to catch your breath and calm down.

You caught sight of Dee’s gaze- he looked confused, worried, and slightly hurt.