My girlfriend gets too into roleplaying?

So me and this girl were good friends and we JUST started dating. Im still a virgin btu we roleplay for fun. We were roleplaying sexy one night in a hotel and then her roleplayign character got made at me and she was taking it way too seriously! my roleplaying character was named 'Mr Money' and I was a p*mp from NY. She was Katy Berry just a small town country girl, btu then she got mad at me for taking Katys innocence! And i was all 'wtf? its just a game!' What should i do? What will it be like on prom night??