Jessica Simpson Is 'Done' Having Any More Children

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If all goes according to plan, Jessica Simpson's family will be stopping at four members.

In an interview with On Air with Ryan Seacrest Thursday, Jessica, 34, revealed that she's definitely not planning on having any more kids with husband Eric Johnson, 35.

Jessica and Eric are already parents to daughter Maxwell, 2, and son Ace Knute, 1.

"Oh, we are done," Jessica stresses. "I mean, I say we're done, but I don't want to accidentally get pregnant one day and then that poor kid feels like it wasn't meant to be or something. ... [But] we've got the girl and we've got the boy."

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 ... Though we just can't understand why she would stop -- she makes the cutest babies ever!

But clearly, Jessica is still in the honeymoon phase with Eric, whom she married over the July 4 weekend.

"We have felt like ever since we got married, we've been kind of living on this honeymoon, for some reason. Life is better," she gushes.

She's even traded in her famous last name for Johnson on her driver's license -- "Doesn't Jessica Johnson sound like the best stripper name ever?" she jokes -- though she's not above still taking advantage of the Simpson name.

Specifically, if it helps her get into a restaurant.

"It depends on what restaurant it is," Jessica jokes. "If it's a hard restaurant to get into, I will definitely say 'Simpson.' It helps a little bit."

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Check out the video to see inside Jessica and Eric's holiday wedding!