Namechanged for this, but been around for donkeys years. DSD and SIL have been married three years
SIL was verbally aggressive to me, when I gently offered to help him with something he was obviously struggling with.
He has been verbally aggressive to DH on two occasions, once because he thought DH was not pushing DGS's buggy in a safe manner (it was fine) and once because DH mentioned that he had a rash and SIL was afraid it might be shingles and DGS might then get chickenpox and be scarred.
He was also verbally aggressive and challenging (and obviously very unhappy) when we set up an ISA for DGS and put it in DSD's name rather than his.
I say that if he is verbally aggressive to us, who he doesn't know particularly well, then there is every chance he is like this with DSD behind closed doors. I can't ask her and DH won't.
Do you think I am right to be concerned for her?