Sarah Jessica Parker and her daughter Tabitha spent a lovely afternoon together in the actress' shoe store – with the youngster even turning sales assistant!MORE: Sarah Jessica Parker reflects on sad family newsThe mother-daughter duo headed to the SJP by Sarah Jessica Parker store in Uptown New York to help out, and we can't get over how grown-up the actress' twin daughter is looking. WATCH: Sarah Jessica Parker shares glimpse inside family homeThe youngster could be seen wearing a lovely