Pressure Is on Khloe Kardashian to Deliver Next Grandchild

Pressure Is on Khloe Kardashian to Deliver Next Grandchild
Khloe Kardashian

05/13/2010 AT 10:50 AM EDT

Having enjoyed her first Mother's Day as a grandmother – to daughter Kourtney Kardashian's boy Mason – Kris Jenner is keen to have more grandkids. And she's looking to Khloe this time.

"My best Mother's Day was probably my first Mother's Day, and now my second will be this day because it's my first as a grandma. And he's pretty cute," Jenner told PEOPLE last weekend while hosting a Mother's Day party at Beso and Eve in Las Vegas.

Reminded that Khloe has said she eventually wants kids too, Jenner replied: "She'd better step it up. I need another grandchild ... It kind of makes sense. I'm hoping."

Khloe, 25, who married L.A. Lakers player Lamar Odom in September, hasn't set a timeline for having children. But the other candidates for babymaking aren't looking likely right now.

Kourtney, 31, is nursing a 6-month-old. And Kim, 29, recently told PEOPLE she's not looking to start a family any time soon. "I babysat a lot in Miami, and it was really, really tough," she said. "It was good that I could babysit and give [Mason] right back."

There is one other option, but that's not ideal either. "Don't make me get pregnant again," says Jenner, 54, "because I'm a little tired."

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