That's it, really. Two years ago my DS, in her late 50s, was divorced by my DBIL after 28 years of marriage. She's always been prickly and as she's aged I and my DB and DBIL have had to tiptoe around her more and more delicately. During the divorce process she went to a counsellor and since then has communicated with us in 'therapy speak'. Everything is about her, her feelings and her speaking her truth. My DB and I listened and nodded and tried to support her and we hoped she'd emerge the other side of therapy happier and easier to get along with.
Now she's sent us several massive WA messages to explain that she's done an online questionnaire and has diagnosed herself as ASD. She's started saying that both our parents were ASD and she also says my brother is ASD. She cites things like the fact that my parents were quiet people who only had a small social circle, as proof. She's said my dad had no friends and I gently reminded her that he belong to the bowling club and also the local cricket club and had friends from his allotment: they all came to his funeral. She's said the same of my mum and I've pointed out that Mum had a number of friends she was regularly in touch with and until she died had several holidays a year with those friends or her sister or other relatives. She also volunteered in a charity shop and did day one evening classes and made friends there. My sister is furious when I point these inconvenient facts out.
My DB is a quiet, family-orientated man like my father and DS says this is proof he's ASD, but DB's certainly not a black-and-white thinker and has no issues with communication and social skills, let alone the more obvious indications of ASD. DS has been angry with him because he's told her he thinks she's got this wrong.
We have no idea what to do or what to say. Unless we just nod and agree with her, DS gets very angry with us. If anyone has any idea of what's going on, please shine a light.