Simple response to someone wanting you to change your seat for this reason: go f yourself.
Now, a stressed mom with toddlers, flying alone, needs help,I’d move for that. Someone needs to sit closer to an elderly person that needs help? Sure.
I probably don’t need to think about how to react beforehand. Years ago my infant in a car seat was seated many rows away. I asked to move and the flight attendant said, “no, not until after we’re in the air.” I said, “fine, I’ll stay here. You can babysit her for the flight.” Talk about stressed out mom...go ahead, offer an out. LOL.