I agree with Ithurts, she is using you to stay in the country, she will suck you dry (pun intended). She is having her cake and eating it. DON'T GIVE UP THE CAKE.
It's okay to do this for her, don't get me wrong, but you need to totally disregard her once she is back in the house. She must clean after herself, do her own thing, which may even be more difficult - and you need to GAL. Do nothing with her, be your own person and enjoy life. Like Sandi2 says, enjoy the time that your WW is giving you.
Just cos things are going right, doesn't mean that they were always wrong.