Rant about a childish 32 year old

So the other day my husbands ex training partners girlfriend asks me about our other halfs traning together again and I tell her that my hubby has already spoke to him about it (andy is very commited to bodybuilding and he has never missed training) I told her, her boyfriend already spoke to Andy. All of a sudden her tune changes. Well Neil has a new training partner, and he can't be dealing with people messing him about. He said next time he sees Ash (my hubbys training partner) he's going to bang him (another word was used but lets not say that).
So I go to the gym before town and tell my husband and Ash is there, it doesn't go down well. Later in the day picking my son up from school my husband and her speak, and I get called over. She denies everything and then tells me 'I don't know who I'm messing with' then she turns to my hubby and says 'do you even know you wife?' (Mu hubby sticks up for me :-) ) So I'm fuming and tell her something from 2 years previous 'Do you even know your boyfriend, asking for my friends numbers saying he wants out of his relationship' She's not happy about this and gets in my face. On leaving school grounds I retaliate 'Hey Nicola you best watch yourself.' Later that night after phone calls (her boyfriend denies it, but they don't have a healthy relationship with black eyes to each other and mental abuse) we get texts saying they want to leave it. So we agree.
She is still lost in school times literally she has told everyone of the schools parents her version (it's a small school) and I get numerous dirty looks now this would bother me if I cared, half of the parents are sheep. All in all she should grow up she has 3 kids and is 32. I'm 22 and I know better.
I think this started through anger of her boyfriend giving up the gym and my hubby not wanting to train with him after him being let down for 2 years. Get over it, be supportive to what your boyfriend wants, I'm supportive of my husbands and his goals and on a side note, I'm very proud of my hubby as he's worked hard to get where he is and become a sponsered athlete.