i kind dont know if because of the dad, i got my expectatives too high, but i kinda dont like the mother as much as the two guys. i believe her lips are kinda not helping, and maybe its them that its making her look quite older than her husband. i think her carefree look like in this drawing u made was more appealing. even if she's loosing her shoe, i kinda liked the fact that she didnt care. both her and her husband are extremely carefree which is a big contrast with the angry kid.
aside from that, her quality looks good. didnt expect anything lesser from u nowadays anyway
just my suggestions.