Is it wrong to dump my girlfriend?

I have been with my girlfiend for abut two months. After I got with her she gave me some news that was tough to swallow. She told me that a month ago she had an abortion..i was shocked and unsure of what to do. I decidded to stay with her because I cared for her and liked her. Recently she has told me that when we had got together she was still pregnant and had the abortion after, for some reason this caused me not to like her as much.She also still talks and depends on the guy who got her pregnant. Im juss bein honest and dont know whether stay with her or not??