Moony just gaped at Padfoot, who now had his hand on his girlfriend's breast. He took a deep breath, trying to calm down and deal with the situation. It almost worked.
He stood up and grabbed Padfoot by the shoulders, walking him away from Emily. He wanted to punch him, but Padfoot was very drunk and probably didn't even know what he was doing. He took another deep breath. "You need to leave now, Pads, or I am going to hurt you." He was mostly calm, really.