My SS's BM has lied since i met her. It started with telling SS at 18mths that her new partner was his dad and that his real BF wasnt. He's only just accepted that he is now, at nearly 9.

She told SS that my MIL hit him (laughable). She tells SS that his BF hit her (also not true). She tells SS not to mention anything to do with school - we think because she has him listed under her new husbands surname.

She won't let SS stay at our house. She won't let him sleep in a room with his Dad. She wont let him eat chocolate. She won't let me pick him up/drop him home. She tells us when we can see him even if its 3 months apart. She wouldn't let him come to our wedding with 6 months notice. She won't let him stay more than two nights. She won;t let us see his school reports or have contact with the school.

She lied on his clinical psychology evaluation that gave him the diagnosis of ADHD. In my opinion he doesn't have ADHD. I think he has behavioural issues based on confusion form all of the lies he has been told.

She has and will do anything to get my OH out of her life - even at the detriment of her own child.

I want to take her back to court but OH says if we take action or say anything then she'll restrict access longterm which will be worse for their relationship. So what is in SSs best interest?