My husband has befriended a lady from work & she & I in turn became friends. We helped her leave abusive husband number 3. She became the closest thing to family we have here & even asked her to be the unofficial godmother to our children. Something earlier this year changed this dynamic & she began posting romantic quotes & posts on my husband's Facebook account. I informed him what was being posted & he said he would speak to her about it. The posts continued & she even posted something to my timeline, out of the blue, that read "Abracadabra...nope you're still a b***h". When questioned she said it was meant as a joke & aimed at either work colleagues or for dealing with customers (we work together). She did not apologise or take the post down but unfriended & blocked me. The posts to my husband's timeline escalated with posts relating to their love & her now claiming they were in a relationship. He denies knowing anything about any of this & has deactivated his FB account. One of her latest posts claims that he & her were setting up bunk bed (at her house) for the little ones (our children, 5 & nearly 3). Again he denies any knowledge but won't cut contact with her. Not sure what I should do. If we split because of this, will I have any grounds to stop her having access to my children, like an Apprehended AVO?