My sister was giving me a ride home from a party so I didn't drive after drinking and we stopped at a Circle K on the way home. A cop pulled up behind us when we were getting back in and asked if we had been drinking. We had and admitted to it so he wrote me an MIP by consumption, nothing to her because she was over 21, but never gave me a breathalyzer or anything. There was beer, all bottles were still there and unopened, in the trunk but it was my sisters, who is over 21 and he had us pour it out and keep the bottles because he said he didn't want to do the paperwork. Is there any way out of it or what kind of trouble am I looking at here??