I’m graduated but my girlfriend is still in college. She was always shy and innocent but over the years she’s wanted to try and more things. When we were at a party at a frat house things started basic with drinking and dancing and her grinding on me. Then a guy came over she liked and she started dancing between me and him. To my surprise I actually liked it and pushed her into him so she grinded on him. I got aroused almost immediately and he started feeling her up. She mumbled something to him and they went up stairs. After 15 minutes she sent a text saying come up when I walked in he was pounding her. I watched and stroked till he finished. My girlfriend finished me with a handjob and while we don’t talk about what happened we hint at it at times. I feel like it’s a thing I never expected.