She looks thinner because her kittens have dropped into the birth canal. She will probably deliver in the next 24-48 hours. Would it be possible to put a nest in the kids closet and put a pet/child gate to keep your son out?
Don't use newspaper for the nests. The ink is just as toxic to kittens as it is to kids.
Don't use newspaper for the nests. The ink is just as toxic to kittens as it is to kids.