We don't know why Rumer Willis doesn't smile more often. (Or why she hangs out with Lindsay Lohan). After all, the girl comes from one of the happier, more stable families in show business.
Granted, it's a bit unusual.
Rumer's mother, Demi Moore, likes to carry guns. Oh, and she also married a celebrity practically half her age. But Ashton Kutcher has proven to be a reliable step-father, providing valuable Lohan lessons for his daughters.
Moore, meanwhile, says her daughters Rumer, Scout and Tallulah spend as much time as possible with both Ashton and their father, Bruce Willis.
"We spend all our holidays together," Moore, who turns 44 on Saturday, tells host Billy Bush in an interview with Access Hollywood that aired Monday.
"We had an intention to keep our children as our priority in the scope of something changing, the format of our family changing," says the Bobby actress, who married Kutcher in Sept. 2005.
The relationship flies in the face of messy break-ups, such as the recent Shanna Moakler/Travis Barker debacle. It's even more impressive when you consider the terms Demi and Willis are on.
"You have to work towards getting over what might have been awkward, or uncomfortable â€" I want his happiness. And I think he wants my happiness," Moore said of her ex-husband.
"And you know, I have somebody who is a great father, who's present, he's a part of their lives," she said of Kutcher, 28. "There are a lot of people who don't have that."
Such as Lindsay and Ali Lohan. Their father is in jail. Maybe Ashton should open up his heart to this troubled duo instead of yelling at Rumer for hanging out with them.
But maybe not. Lindsay pretty much sucks.