GAL, my ILs and I also get along great. We're very close. I've been able to tell them when I'm down and when things are going well. I don't know how close you are with MIL, so I'd probably stick with the upbeat GAL you. I probably wouldn't get into a long talk about getting W back, maybe mention it in passing if MIL brings it up.
I say this because I found out (it should have been crystal clear before this) that MIL and W *will* talk. Even if their R is strained, W is still MILs daughter. If you keep things positive and upbeat on your end, all MIL can say to your W is that you are doing well.
Me 43 W 38 M 5 T 7 SD20 S15, S13 with 1st W ILYBNILWY June 2010 Separation/Bomb July 2010 Divorce Feb 8, 2011