I can't understand the deal with the shorts. I would think that you should be able to make everyday decisions for the boys when you have them on the weekends. Unless it's some kind of emergency, illness, hospital thing..
I can see her point about the walking home from school I guess. Mothers are like that with their boys. How old is the oldest? If he's 15 or so and she's saying no then that's a little strange I think. If he's 10-13, she's probably thinking he's not ready yet. I'm like you I would not have a problem with it..but mothers with their sons...that's a whole different ballgame.