Can you try just maintaining a status quo? That is, be friendly when she interacts with you, but do not seek her out unless you absolutely have to and "ignore" her otherwise?
Just see what happens that way? Sort of a "going dark" even though you're in the same house?
My guess is that her reaction will be like a frightful cat - once you sit down and quit trying to get her attention, she'll start creeping forward....
ME: 38 BF: 40 T: 10y, no kids, no M (by choice) BD: 7/14/14, BF admits to PA, wants out, lies about new R. 10/1/14: I move out, BF lies about move in with OW 12/4/14: OW confronted, reveals all the lies
