My horny girlfriend wont stop sucking

Hello I'm Josh and a have a bit of bubble ass problem. My sexy, but horny at all times girlfriend will not stop sucking. Whatever I do I have that problem, she likes the taste of my big, fat cock too much. The only way I could push off my cock is if my cock get a way to her wet, and silky pussy. But even at that times I feel her desire for it and whenever I cum or finish, she sucks it again like she really loves her own cum.