@cyclingmad is it because you plan to dump your kids on her and she's enjoyed the break?
Everyone on here is going into raphsodies over taking their kids to their parents to give themselves a break and are not stopping to look at the wider picture: I'm sure some grandparents will be thrilled to see their grandchildren but many will not be so happy at yet again becoming a dumping ground.
Also, fear mongering nothing. It's over 50's that are in the high risk category, particularly if they have underlying conditions. Your mother has every right to be worried for her own health.
How about you see this situation from some else's point of view other than your own?
You all need to calm the F down.
It's single parent parent families that can form a bubble with one other household and shielders remain the same. Don't all get carried away at the thought of palming off your cherubs.