My feet never grew, but my mum went up half a size each time and stayed that way!
This is my 3rd & most of my shoes still fit this time, except when my feet swell. After I lost all weight from first time, my feet actually got smaller than before I was pregnant, lol
I swear that mine have stayed wider! I have shoes that I haven't been able to wear again. A couple pairs of flats have seemed tighter even months afterward.
Everyone is different. Sometimes they go back to normal, sometimes they don't. I worked at a shoe store and I heard so many ladies say they went up a shoe size with every kid. Yikes! I hope mine go back down because I have a closet full of shoes that don't fit me!