My mother in law has borderline personality disorder, she is undiagnosed as she refuses to see she has a problem, but she absolutely fits the description. This has been confirmed by a psychotherapist that my DH and I saw together to try to work out how to handle her.
I'm pregnant with my first baby and am very concerned about her behaviour. She has been verbally abusive to us in the past and made all sorts of threats around our wedding. She is incapable of following rules and boundaries regarding grandchildren e.g. she took her 5 year old granddaughter to the theatre and left her on her own during the entire interval so that she could go and get herself a drink - this despite being asked by BIL and SIL never to leave her unsupervised. She also left same granddaughter outside in the garden crying as a baby whilst she was meant to be looking after her (SIL found her in the garden screaming when she came to collect her), again this despite the fact she was asked not to leave her unsupervised. She regularly picks fights with both her sons and is generally emotionally out of control - not someone you would want babysitting your child - but she is also very pushy about wanting to see her grandchildren, wanting to have them over to stay and wanting to take them out on their own.
I'm not looking to stop access at all, but would only ever be comfortable with occasional short supervised visits. Does she have the right to demand any more than that? We go through phases of no/ very low contact with her when she is being particularly unpleasant - what would be the repercussions if we did this with grandchildren involved?
It might seem a bit mad that I'm thinking about this now, but I know that she is going to ramp up the crazy behaviour and I want all my ducks in a row.