We almost forgot that Ashlee Simpson was famous, but apparently the younger Simpson sister is maintaining relevance through the nepotism that got her here in the first place and latching onto big sis Jessica for support.

Seems Ashlee's partying has reportedly gotten so out of control that Papa Joe and mom Tina Simpson have recruited Jessica to keep an eye on her troubled little sis. (You know, when Jessica's not busy getting pregnant and wondering how it all happened.)

A few weeks ago, Ashlee's ex-husband and baby daddy, Fall Out Boy bassist Pete Wentz, worried that her habits were going to be bad news for their son, Bronx.

“He’s concerned that she’s burning the candle at both ends and worried about the effect on Bronx if she continues in this current state," a source said.

“Pete’s told Ashlee that enough is enough, and she has to cut back on the partying. He’s even spoken to [her mom] Tina to get her take on the matter and make sure that he’s not overreacting in any way. She reassured him that he isn't and said she’s been worried about Ashlee too.”

Thankfully, Jessica's pregnancy actually helped everything out -- because guess who's not about to hit the bars? “Tina’s asked Jessica to look out for Ashlee and make sure she doesn't start partying too hard once again,” a source revealed to Radar Online.

“With Jessica focusing on her second pregnancy, she’s a calming influence on Ashlee because she doesn't want to go out on the town. Instead, she prefers family nights in relaxing and has encouraged Ashlee to join them when they are all together, which she has been doing," the source added.

“Ashlee’s been looking a lot more like her old self lately appears a lot healthier. However, Tina has told Jessica to keep an eye on the situation, just like she is, to see if Ashlee falls back into her bad old ways again — only time will tell.”

Here's hoping Ashlee can keep it together, because all that booze can't be good for her acid reflux.

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