Dream of girlfriend

My girlfriend told me she has to return another mans pants, I ask her why she has them and she tells me she slept with him the night before. I ask her how many people she has slept with since we moved out and brokeup but before we got back together. then I asked well how many people did she sleep with when I was in jail. she replied just one. as if it was no big deal. so I got upset and left so she followed me and stealing my stuff.