Originally Posted by Cat Herder:
I do say something.
In this case I'd probably send DCM a quick text saying the pants are causing a TMI issue and butt crack discussion is all the rage, today (with a laugh emoji). Then I would change the child into her change of clothing and send the offending pants home in a bag. I'd expect a new change of clothing or no drop-off the next day (normal, everyday rule).
Rinse/repeat until it is no longer my issue to solve.
I'd also send home some of my children's clothing hoard donated by all the other families. I am a drop-off and share site, self made.
I changed her into her spare pants and they too were ridiculous. But mom just posted a picture of herself at a salon getting her hair all done up so there's that.