Pete Wentz groceries hat tattoo ashlee simpson

Pete Wentz and his son Bronx went grocery shopping in Studio City yesterday, and the Fall Out Boy rocker had his hands full with the adorable 3-year-old and a cart full of goodies.

We're not sure where ladylove Meagan Camper was (perhaps at home with their new puppy?), but we're even more curious about mom Ashlee Simpson's whereabouts. Seriously...doesn't it seem like we always see Bronx out with Pete, but rarely Ash?