It sounds like a line from Leno's monologue, but it's true: Ashton Kutcher's mom wants to meet Demi Moore.

``Ashton & Demi: It's getting SO HOT!'' the cover of this week's US Weekly reads. ``Midnight romps, sexy dinners out, his mom wants to meet her - it's serious.''

As interested as I am in the romps and the dinners (I think stars smooch at restaurants so they can write off the meals as a business expense when the inevitable photos are published), it was the insertion of Ashton's mother into the scene that was the most scintillating.

Sure she wants to meet Demi. Who doesn't want to meet a movie star? Who knows, maybe Ashton's mom has a thing for Bruce Willis, and - she must read the celebrity rags - knows that Bruce and Demi (and now Ashton) spend a lot of time together. Maybe she figures if Demi goes to Homestead, Iowa, for her blessing, Bruce will come along, too.

The US Weekly article didn't say whether Ashton's mom, in expressing her eagerness to meet her son's girlfriend, was speaking as a potential future mother-in-law or as a fan - and maybe one from way back. Heck, maybe in 1982, sometimes while Ashton and his fraternal twin brother were napping after preschool, mom Diane Portwood watched ``General Hospital,'' and there, playing a sassy auburn-haired investigative reporter named Jackie Templeton, was none other than the mother of her future stepgrandchildren. Or maybe, a few years later, on a much-needed night out with the girls, she went to see ``St. Elmo's Fire'' or ``About Last Night,'' and has liked Demi since then.

As Diane already has met Ashton's other famous-ish girlfriends (his ``Just Married'' co-star Brittany Murphy among them), you've got to assume that she'll meet Demi, too.

And the good news is that they'll probably have lots to talk about above and beyond the usual girlfriend-meeting-mom stuff. (Namely, ``You've done such a wonderful job with your son,'' ``He's a gift to mankind,'' etc.) As two divorced women, each with three kids, each of whom was married to a man in the business (in Demi's case, show business, and Diane's, factory work), they'll have more in common than, well, Demi and Ashton. And there's something else they could share: being married to a younger man. Diane's second husband is 10 years her junior.

Can't you see the scene: Demi and Diane, after having the requisite microdermabrasion-vs.-Botox discussion, move on to the topic of kids, and there they are laughing and commiserating over the challenges of being a mother, when Ashton comes in. ``What are you guys talking about?'' he asks, ``Oh, nothing dear, run along, mommy and her friend will be right out.''

As Ashton might say, ``Dude, where's my Hollywood hottie?''