The day is fast approaching

We decided a few weeks ago to let my mother in law move in with us for the second time. The first time was a complete disaster. She intentionally does things just to piss me off. Then acts as if she has no clue what she has done if something is said to her about it. It was a mutual decision to let her move in because times are hard, and she will be able, or says she will, help pay bills here. I already have this feeling of dread in my stomach. Last time she lived here only for eight months or so, but already I was ready to walk out on my husband only so I never had to see her face again. I am hoping this time I can go into this with a fresh perspective and not let her get to me. I keep telling myself not to give her the satisfaction. Because after all that is what she wants to do. She wants to come between me and my husband. She has this sick obsession with him. I do not exaggerate this at all. She went to a family dinner with us one time. My family…. and she starts talking about how Jeff (my husband) makes awesome lasagna. I said I had never eaten lasagna he made. She laughed and said "oh, that must have been when we were together". My aunt gave me the weirdest look. It’s like she doesn’t realize she is only making a fool of herself. She treats me like I’m competition and I can’t stand it. He didn’t even find her behavior or comments odd until I mentioned it to him one day. I told him to just pay attention to her mannerisms and draw his own conclusion. So, now when she is doing or saying something inapporpriate he tells her to stop. At least I’m grateful for that. I just hope everything works out. I’m sure I will be on here plenty pouring my heart out to anyone who will listen and be able to offer positive advice and a fresh outlook. Thanks in advance…..