"She has a crush [on Ben]," a source tells the new issue of In Touch, on newsstands now.

He's almost half her age, but that hasn't stopped the Kardashian matriarch."They've been spending a lot of time together," says the source. Kris, 57, even posted a photo (with the hashtag #livinglifeee) of her and Ben, 31, at his vineyard in Sonoma, Calif., on Sept. 28.

Of course, it doesn't hurt that he's wealthy and famous. "She and Bruce are separated, so now they're allowed to see other people -- and she's in full-on dating mode."