Kate Gosselin may keep a smile on her face when the cameras are rolling -- but when she is off-screen, the mom of eight can get a little nasty, according to people who saw the brood on the beach recently.
Gosselin was "rude and hateful" to kids and witnesses during her week-long jaunt to Bald Head Island, N.C., where she filmed an episode of her TLC show "Jon & Kate Plus Eight" -- without Jon, who's reportedly stepped out on his wife with multiple women.
"Everyone that's encountered her says she's been rude, mean and hateful," beachgoer Kim Kirsch told Us magazine about Kate's behavior on the island, where she dragged her kids to celebrate Memorial Day.
Kate ignored her brood to canoodle with bodyguard Steve Neild -- a man Jon once thought Kate was having an affair with -- and when her children tried to bond with Mommy, Kate gave them the cold shoulder.
"When Kate sat on the edge of the pool, she told one of [the twins], 'If you splash me, you're dead meat,'" witness Ann Michele Sweeney told Us magazine. "She was not joking at all."
Kate's kid's response?
"Mommy, you're mean!" the little Gosselin wailed. It was unclear which of the eight Gosselin kids got the brush-off from Mommy.
Kate also frittered away most of her vacation texting on her phone and hamming it up for the TLC cameras, who took up two media rooms in the ritzy $1,807 rental home she occupied during the vacation, witnesses said.
"She completely ignored her children the entire time," Sweeney said.
Jon hung with two family friends in Newburgh, N.Y., during wife Kate's vacation.
He opened up to People magazine this week about the controversy surrounding his marriage, saying he's had more than his fill of media attention.
"Enough is enough," he told the magazine.