Game Center Issues

So me and my fiancé were both using my apple ID so we could use less money when we buy apps, music etc. But when we tried playing the same game it told my ipad that my game enter account is already playing this game on a different account, so we tried just logging her out thinking it would fix the issues but even after uninstalling the game and logging her in as a different account it still says that my account is already being used for this app on a different device, can anyone help me figure out a solution?