Am Being Jealous? Or Right? (Girls Only Please)?

I play vollyball at a local bar. My girlfriend comes and watches me regularly. Were about to leave because I DJ at another bar in the downtown area, which she also comes and sits with me till we have to leave. when she see two guys she knows. These two guys she has slept with multiple times before we were dating. And she knows i hate them both because they have also tried to get with her while weve been together as well. right as were leaving she tells me she wants to stay and have drinks with them and then get a ride to my bar while i go by myself. Am I wrong in being upset or am i being jealous?