WAW wants to get togeather?

[P17]

the thing is she won't and doesn't talk to them much as it is and she def. won't explain anything to them.

Call her out on it in front of the kids then? Make them aware that mummy has something she needs to talk to them about and let her get on with it.

If that doesn't work then don't you explain it. Let the kids ask her. Let the kids be curious and pressure her.