I can somewhat understand what you're feeling. I don't know for sure, but I think W blocked me from FB awhile back (she says she didn't) so that the only thing I can see are when she posts profile picture updates. FB has been known to be screwy sometimes, but who knows. Anyway, there are times when I have family members and friends ask me about pictures that she posts of her and the kids. At first, it sucked because it always felt like a blind side. Why couldn't she share that stuff with me? After awhile, I kind of stopped caring and decided to take the high road. I would send her pictures of the kids every now and then when we were out doing stuff together. I would get the response "They look like they're having a good time." Eventually, she started sending me pictures of the kids when they were off doing things while I was at work.
Maybe the same will work for you? Extend the olive branch by sending pictures of the kids (don't include yourself) and maybe she'll start to think to do the same with you? Maybe some of the vets can comment on that.
M:35 W:31 S: 9 D: 5 M: 11.5 yrs BD: 5/13 W moved out: 7/13