If I was to switch from plan A to plan B does it require that one of us move out? Can you still occupy the same household and be on plan b or do I have to demand she moves out, should I move out and is it really right for me to do that? Plan B confuses me in that sense. Anyone here plan B'ing with wayward spouse still at household?

I have done both. Plan B while he is still at home is not effective. He has no opportunity to miss you. If anything, trying Plan B while under the same roof has the potential of blowing up in your face because you will be engaging in love busters in order to place additional boundaries between the two of you. By being in separate households, the natural boundaries are there without you having to love bust constantly in order to keep things separate.

Plan B is about letting him get a real feel for what life without you is like, both the good and the bad. That means he no longer gets to enjoy all of the little things that you do that he takes for granted. It's about making him aware of the things that he use to take for granted because they are no longer available to him so that he can take them for granted. That's impossible to do this while under the same roof. I know. I tried to do a modified Plan B even though MB is fairly clear about not doing this. Through my own stubborness, I now understand why they strongly recommend against remaining under the same roof during Plan B. Since then, I have moved on to a real Plan B. I can tell you that this one is much more effective in that H is having to fend for himself totally and he doesn't like it. Read my post Week 1 of Plan B- H sent flowers.