What would you do if you were me:
Me and DH and DC = 1 household.
DH's Mum and her DC = 1 household
DH's Dad = 1 household (stays overnight with his new gf so not sure if he counts as bubble to DH's Mum and their DC?)
DH's DB and his wife = 1 household
DH's DSis lives alone so can bubble with DH's Mum?
DMil's bf = 1 household.
I'm thinking just stay out of it for one year. It's too complicated and risky I think. But could there be a solution here? DH reckons if MIL didn't see her bf then that would be fine as his DF and DSis counts as one bubble???
My MIL is liable to cry if we say we can't see her this year.
And she hasn't even considered my family in all of this!