Very brief background - she came close to ruining our wedding with months of hysterics about certain people we wanted to invite (people who she felt had sided against her in her divorce but who were very important people for my H to invite) and was so bad on the day itself that even the photographer came up to ask me what was wrong with her. Too many other examples of histrionic behaviour to catalogue. She is a victim and everyone gangs up against her (apart from her other son who is the golden child these days).
This week she had a (minor) elective operation. DH offered to collect her from the hospital and drive her home. For the entire journey, she ranted and wept at him, every time he said something bland like, "I'm sure it will all be OK" she would scream, "don't tell me that! you don't know that!" And when he said nothing, screamed at him for saying nothing.
Halfway through the drive she suddenly got it into her head that he had accidentally called her by the name of this particular woman who she had not wanted inviited to our wedding - at which point she began to accuse DH of having invited this woman to stay. He hadn't even mentioned her name - there would have been absolutely no reason to. When he said this, she screamed at him that he was a liar and she couldn't trust him. Twice more on the drive she demanded he tell her the truth about whether or not this woman has visited. (She hasn't; not sure it should matter even if she had).
She then started up her usual paranoid complaints (that my family exclude her from everything; that DH lies to her about where he is and what he does with my family) then she jumped out of the car and refused to let him take her the rest of the way.
There has since been the a email sent by her since about how a doctor friend has told her that the anasthetic she was given might well have caused paranoia. (This despite 4 years of paranoid and hysterical behaviour approx once every 2 months). 'Explaining' rather than apologising. She NEVER apologises; DH pushes and pushes to get her to accept responsibility for her behaviour every time, and she never does. He then withdraws from her for several months but eventualy she starts being 'pleasant'. He has NO support from other family members on his attempted stance to challenge her.
This has really made me reach the end of my tether with her. I have written her a long email (I can't face the hysteria of a face-to-face confrontation) but not sent it. DH isn't keen for me to send it but I feel so strongly on his behalf that am tired of her abusing him. He stands up to her every single time and I want to stand up for him for a change. Should I send the email? Or just ignore her?