Some of the poor things can't do right for doing wrong.
If they stand back and give the mum space they're 'ignoring their DGC'.
If they get involved they're 'trying to take over'.
If they buy a present it's 'too expensive', 'too cheap', 'inappropriate', 'more clutter'.
If they don't buy a present they're 'mean', 'uncaring', 'totally disinterested'.
If they offer to help around the house they're 'interfering'.
If they don't offer to help they're 'in the way'.
Jeeze, who'd be a MIL?