I just spoke on the phone to my 74-year-old mother. She's fine and well and self-isolating as best as possible.
Whilst on the phone I heard a voice in the background and asked who it was. She replied "oh, it's just your 'sibling'. They popped around to see me for a chat and a cuppa".
Sibling has two children, one primary school age and one in preschool.
But "it's ok, they said everyone feels fine, and we sat six feet apart".
AIBU to be utterly fuming and think this was a very irresponsible act putting my DM at unnecessary risk?