Dasha Astafieva: Girls Next Door Home-Wrecker?

The norm always gets boring - even if the norm is sleeping with (and living with) three unwed Playboy bunnies at one's leisure.

Yes, Hugh Hefner is reportedly falling for the "charms" of a woman outside his trio of girlfriends. The National Enquirer says he has been paying a lot of attention to a sexy, brunette Ukranian model named Dasha Astafieva.

That piece of info alone should raise a red flag - and not only is Astafieva a brunette, she may even have real boobs - but numerous European sources are also reporting Hef's hot and heavy romance with the Playboy mogul.

Check out these pics of Dasha Astafieva and you'll see why ...

Hugh Hefner's alleged relationship with Dasha Astafieva is royally pissing off The Girls Next Door - Holly Madison, Bridget Marquardt and Kendra Wilkinson.

Holly Madison, Hugh's "#1 girlfriend," whatever that means, is said to be taking this particularly hard. Holly wants to have the 82-year-old’s baby, and right now, she rules Bridget and Kendra in the girlfriend hierarchy.

But it's a delicate balance, you know. If another woman like Astafieva enters the picture, even Holly Madison nude could be on the outs.

Such is life at the Playboy Mansion.

According to Russia Today, Dasha (who won the reality show Stars Factory in the Ukraine) has already moved in with the girls as of late July.

The Enquirer doesn't have her living in the mansion yet, but says it's been hinted at and Hef’s girlfriends are “terrified” at the prospect.

Kendra, Bridget and Holly are also said to be worried that Dasha Astafieva will become a regular on their reality show, The Girls Next Door.

What would they call it, The Girls Next Four? Stay tuned.

When you're Hugh Hefner, even this gets passe eventually.