Hugh Hefner is angry as hell about Kendra Wilkinson's engagement!

DO NOT mess with Hef!

Turns out Girls Next Door star Kendra Wilkinson's engagement (which we broke) to pro ballplayer Hank Baskett isn't such a hands-down happy celebration after all. Call it Bunnygate, if you will.

As you probably were aware, plans were already majorly in the works, with Hugh Hefner's blessing, not to mention participation, for Kendra to leave GND for her own show. "It was supposed to be Kendra, sexy and single, out of the mansion, on her own," said a source close to the deal.

But here's what's gone down:

Kendra's engagement to Hank "caught Hef way off guard," reveals the Girls Next Door type, who insists H2 was most displeased at the rush to the altar.

"All that you see now, with Hugh saying he's going to give the bride away, that the wedding's going to be at the mansion, it's bull****," piped the close Kendra chum, who believes Playboy's put-on-the-spot positive spin won't really come to pass. Only time and (call me jaded) potential ratings will tell.

Sources inside Wilkinson's camp do not blame Kendra, they blame Hank: "[Baskett] completely jumped the gun," insists a Wilkinson colleague. "He showed up with a camera crew and proposed to Kendra on top of the Space Needle; of course Kendra said yes, she's absolutely thrilled!"

But not Hef. Nor are the folks who are trying to turn Kendra into the next viable Pam Anderson type, only without the sex tapes.