Sounds like you are creating a new and nice environment with GF and your girls will be better for it
My kids absolutely love my BF and he has been a stable rock for us for many years the 4 of us have had much fun together and his presence has made a difference for them-
as for you XW--she may have to accept her choices and her life--to me the choices most MCer make seems crazy, but many of them seem to choose the same path---always leads to addiction destruction and alienation
all the best
married 14 years H 42 bomb 2/07 IDLYA D final 3 /09 M ow D ow