Thanks for the support and encouragement, LWB and TAL.
My MIL is a three-time champion WAW-MLC, and I think she now sees it as her current mission in life to "help" her daughter (my W) make it into the 2008 Divorce Olympics.
Seriously, I really feel sorry for MIL's 2cnd H -- the poor man literally died of a broken heart just two years later after she ran off with H #3 (okay, so I hear he took up drinking again and that was the contributing factor, but he was way too young to go when he did (late 50's)).
To see my W now, after what she said years ago when she and I were dating, just baffles me. W had made me promise her that I would never let her become like her mother. I fear I have really failed her in that.