Meaghan somehow managed to behave herself during the ceremony--probably from a mixture of a hang over and shocked disbelief that this was actually happening. Afterwards, she got drunk as a skunk and made out with Doc in public in celebration of the fact that they didn't have to pretend they weren't a couple, though she would stop if Nick was near. She also made sure to hug Nick several times before he left.
She applauded them when they came out of the bathroom and not too long later dragged Doc off to their hotel room because THEY DON'T HAVE WORK THE NEXT DAY!