Pete Wentz Meagan Camper hat dog farmers market tattoo

Even new puppy Berenstein came along for the outing!

Pete Wentz and girlfriend Meagan Camper took his son Bronx to the farmer's market in Studio City on Saturday, and from the looks of it, the leggy model seems to be an honorary part of the family. We wonder how Ashlee Simpson feels about another woman spending so much time with her son?

Given that we haven't seen the singer-actress with her little boy in a while, we're going to assume she's just fine handing over mommy duty to Meagan while she spends time with her Boardwalk Empire beau Vincent Piazza.

If you believe the rumors, another person Ash hasn't seen in a while is her sister Jessica. According to reports, the sisters are barely on speaking terms after Jess turned to her younger sibling for weight loss support and was given the cold shoulder. "She moaned to Ashlee about [the weight loss] and when Ashlee showed very little sympathy for her, Jess lost it. She was devastated and hit back, saying Ashlee is jealous of the attention she gets. It turned into a massive fight," a source told OK! magazine.

We haven't seen Pete looking this happy in a while, so could there be a proposal on the way?