Strange behaviour

Well, is there a reason your brother ( and his wife ) cannot be away from the sister's daughters or any other girls and women he may feel inclined to tough their breasts? Without further information I would say that just like dementia, alzheimers, stroke and a myriad other diseases, the afflicted person requires continuous support, for example changing his diapers, or feeding him, or dressing him, and he may need to be away from other people if the situation demands it. I mean you talk about reporting this to safeguarding, you would report a sick person for ... being sick?! I remember my grandmother suffered from dementia, after she visited the bathroom we had to clean sh*t from light switches, door handles, it was like a war zone, but it did not occur to me to report my poor grandma or my poor mother to social services.

HI Caoimhe101

oh that's a challenging situation to manage.  Keeping everyone safe has to be a key priority here.

Brain tumours can alter people's personality and can also lead to dementia like symptoms. Has this change in behaviour been reported to his medical team? If not, that would be my first port of call. 

I found these links that may give a bit more background

Coping with changes after brain tumour treatment | Macmillan Cancer Support

Brain tumour personality changes | The Brain Tumour Charity

I hope you manage to get a better balance for everyone's sake.

love n hugs

Wee Me xx