Long story short, SIL has borderline personality disorder. Last week she was at our house one evening and after she had gone, we were woken up by police officers banging on the door. SIL had taken an overdose and gone for a long walk. She let the mental health services know and they called the police. They had helicopters and sniffer dogs out for her and DH was out on his bike scanning the area for her dead body.
She was found safely and taken to hospital and back to work the following Monday. We also found out she did this in the same week a couple of days previous. She is gobsmacked at the backlash it has received as she never had any intention to kill herself, she gets a release from the attention perhaps.
Anyhow, she keeps badgering on about taking my 4 year old out on her own. She sent me a text to say she would never let him come to any harm. I replied to say I know that, and I would be happy for her to babysit DS when the dust has settled and she is feeling better. She accepted this.
Yesterday, we were having dinner in a pub and she was asking DH and I again if she could take Ds to the cinema. DH brushed it off saying we were going away, and she kept on asking when we were free. When DH went to the toilet, she said to me she was sorry if she was out of order asking to take DS to the cinema. I said it wasn't out of order, it was very kind - but I would prefer not as it was still too soon after what had happened the previous weekend.
She got very upset and it was the most awkward dinner ever as she didn't say a word. I said I hope I hadn't upset her, and what would she do if she was in my shoes. When I got back from taking DS to the loo, she had gone.
I was sorry to upset her, so I Am asking aibu and how to resolve the tension between SIL and I?