Pete Wentz and his adorable son Bronx went on an errand run in Studio City on Saturday, and the week before that the 4-year-old traveled with mom Ashlee Simpson and the rest of her family to Hawaii for Christmas.

Ash is back in New York City, and we know she's working on her upcoming fourth album, but since she's split from beau Vincent Piazza, we have to wonder why she's so far away from her little boy! Why not move back to Los Angeles? We know Pete loves being on daddy duty when he's not hanging out with his hot young girlfriend, but we're guessing Bronx misses mommy!

On Sunday Pete Wentz and girlfriend Meagan Camper were snapped at the Farmers Market in Studio City, and while Bronx had some fun on the slide, Pete and Meagan grabbed him a shaved ice.

Mom Ashlee Simpson is in Florida with her sister Jessica to promote their clothing line, so it looks like Meagan and Pete will have plenty of time to bond with his adorable little boy. But will Ash make it back in time for Bronx's fourth birthday tomorrow?

And speaking of Ashlee, Radar reports that her father Joe is trying to manage her career after Jessica decided she doesn’t want to be represented by him anymore. A source tells the site, “It’s no secret that Joe favored Jessica over Ashlee when they were growing up. Jessica was always the more famous and most successful of the two, and made the most money for the family. So, for years Joe made sure Jessica got his full attention and Ashlee basically took the back seat and had to rely on mom Tina Simpson for support. But, now, Joe is doubling down career wise on Ashlee. Ashlee is Joe’s main source of potential income right now as Jessica doesn’t want him to manage her, and he is pushing her hard.”

Hmm, think that's true?

Pete and Ashlee's little boy is getting so big!

Pete Wentz took son Bronx on an errand run with girlfriend Meagan Camper yesterday, and the couple couldn't help but dote on the rocker's son. Could the leggy model be a stepmom-in-training? She looks like a natural at parenting!

We wonder how much this Fall Out Boy knows about his former father-in-law's gay scandal? According to reports, Joe Simpson came out to his family shortly before wife Tina filed for divorce, and rumor has it his daughter's are not taking the shocking news too well!

Ashlee has been throwing herself into work in the wake of all the upset, and is set to release her brand new song "Bat For A Heart" on Nov. 21.

We bet Pete is glad to be out of the Simpson family drama!

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?

When it comes to his pumpkins, anyway! We all know that the Fall Out Boy rocker is a fan of skinny hipster types...

Pete Wentz and girlfriend Meagan Camper were spotted picking out pumpkins on Tuesday afternoon, and little Bronx wasn't with them, so maybe he's with mom Ashlee Simpson for once? After all, we spotted her grabbing lunch with a friend the other day, so we know she's back in town!

When Pete's not spending time with Meagan or his adorable little boy, apparently he's obsessing over the latest episode of Showtime's hit series, Homeland! "[M]ost of the time when I'm quiet on a conference call i am thinking about next weeks episode of homeland," he tweeted yesterday. Good to know!

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?

They make quite the trio!

Pete Wentz and his son Bronx spent some quality time with his supermodel girlfriend Meagan Camper in Beverly Hills on Friday.

The 33-year-old rocker's new lady has been fitting in quite well with his 3-year-old. She was present when he got his first pet, a 10-week-old Vizsla puppy earlier this month, who was named Bearenstain after the children's book, The Berenstain Bears. Good to see she's getting along with Bronx so well!

Pete Wentz and girlfriend Meagan Camper ran errands in Los Angeles on Tuesday, and it looks like there's a new addition to the family!

The duo were spotted leaving Petco with their new puppy Bearenstein, and we have to wonder if this was Pete's one year anniversary gift to the 23-year-old model! Pete already has two English bulldogs, Hemingway and Rigby, and they were featured on The Dog Whisperer back in 2008 when he was still married to Ashlee Simpson.

Hey, it's not an engagement ring, but it hasn't even been two years since the Fall Out Boy rocker finalized his divorce, so we're guessing Miss Meagan will have to wait a little bit longer for that one...