More of a WWYD than a AIBU...
We're in a tier 3 area and have been for months. In a support bubble with dm, who's widowed, early 80s, with dementia (still at home with carers visiting). Dsis and her family are in a tier 2 area several hours drive away. She hasnt seen dm since early sept when we went into tier 3. She wants to visit for xmas day with her family ie drive up late xmas eve to arrive after midnight, then leave late xmas day. I understand this to be within the rules. Her family has been self isolating since the kids finished school last friday (she works outside the home but has taken annual leave to reduce risk).
Since the rules all changed dp is now reluctant for them to visit us and stay overnight, feeling it puts us at risk (he is 51 but no health conditions). I feel awful telling them they cant stay as no idea when dsis will next be able to see mum - she's gone downhill a lot since march so who know what she'll be like by spring. Them going to stay at mum's isnt really an option as the hob has been disconnected due to fire risk, they'd have to take all food with them and prepare it etc- i think it would be a miserable xmas day for my neices. My dc would also love to see their cousins.
WIBU to say they can stay wirh us, as although it's not advised, i see it as low risk? I feel more at risk of infecting dm as I'm still having to go out shopping etc. Dp just thinks we should blanket follow advice to not mix. Feel really stuck.