My S's IC laid it on the line to WAW a few weeks back: Both children will see LBS as the victim and you as the person who broke their home.
When W objected with the usual story about how I (that is, SP) did this and that and W was driven to it and all, IC stopped her and said it didn't matter. First, the kids would never know that stuff (as children). Second, because they're staying with me they will naturally ally themselves with me. So she's going to be the Bad Guy and might as well get used to it.
No surprise to me but an eye-opener to W.
Not that it changed her mind. And that's the real point, isn't it?
So I agree with Puppy -- don't shield her from the facts. You don't have to deliver them cruelly, but you buy yourself nothing -- and do neither D nor W any favors -- by cushioning the blow, either.
