CB, only advice I could give is to not involve MIL. My w told her mother so its something they discuss. On our trip this week, MIL and I talked about how W and I are both growing from this, and how God will see us through it. My only advice to MIL in dealing with W was to leave her alone. W has to do this on her own. We can guilt her into coming home but it will only postpone the inevitable.
In my sitch, MIL had a hand in screwing up W to begin with. Why would I think she could do better this time?
M - 42 W- 37 S's - 9,6 M-12 T-14 FIL- diagnosed with fatal disease spring 2011 ILYBNILWY - march '12 FIL - died jan '13 W Moved out week later