I don't understand why she picks those rompers for him everyday - everyone wants their child to be comfy but also presentable and tidy! There are so many gorgeous boys clothes around. I have 3 kids - my 3rd is 6 months old and already has some lovely autumn stuff that's comfy but also lovely looking. Lovely cord trousers or ribbed leggings/joggers, chunky cardigans, little jumpers and collared vests. I love little boy clothes!
And secondly, as soon as my eldest son [now almost 9] started to walk, we took him to Clarks and had him properly fitted and got him a proper pair of shoes. I wouldn't dream of letting him walk around outside in socks or trainers that I'd just picked off the shelf. It's different when they're older but they need proper support when they're first walking.