I'm left with one question bothering me.
What's the REAL connection with you and your wife ?
Just something about the fact that there were serious enough issues between you two for her to MOVE OUT tells me there's more to the story here. Something seems missing ?
Was that radical move ALL about Nicki ?
My instinct (only that) says no. But I suppose it's possible. People have been know to take all manner of radical action in a fit of anger.
But I think you have to look deep into that - not for any of us on a forum - but for yourselves.
Good luck - a happy triad can be a wonderful thing.