Yes, when the 'alien' behavior takes over- the LBS can't predict anything. If she's telling you that she needs more alone time- even from her S (which is horrid)- for what ever reason, she's feeling trapped. I'm guessing here, but it seem logical that it's too painful for her to be around S b/c it's a visual reminder of the destruction her actions are causing... and instead of being the mature adult and make the sacrifice for her kid, she's being selfish and taking care of herself instead. The amount of selfish action that the WAS is capable of- still amazes me.
My H went through that the first month after the bomb- he couldn't get away fast enough or far enough. I expressed concern for my kids missing their dad, but left it alone after that and let him 'have his space'. He thought that he wanted a lot of alone time... but after a few weeks, he started to come around more. So much so that he came over unannounced-which I honestly didn't mind b/c I loved having him around- but I had to create a boundary that he *must* call ahead since he had made it clear that this wasn't his home anymore and he had to act like a guest... I quickly noticed a change. He comes over almost every day, even if it's just for an hour, to see the boys.
My point is, you need to let her go have the 'time alone' that she thinks she wants. You do have a right to express your concern for the kids (kid talk is never against DBing) Perhaps, you explain to her that she is still needed to pick up S from school because of your working hours, but that you're only expectation of her.
M-31, H-31 T-9, M-7 S-6, s-20mth sep 8/1/11 ILYNILWY 11/29/11 Creating separation papers. Discover H has feelings for BFF, she does too 1/11/12 H moves out 1.20.12