Pete Wentz and Ashlee Simpson are at odds over when to expand their family. At 30, the Fall Out Boy bassist is eager for his 25-year-old wife to get moving on birthing the couple’s second child. Ashlee, on the other hand, wants another child — eventually — but is determined to focus her energy on her new CW soap Melrose Place, premiering in September.

Rachpoot/Stefan/INFphoto.com

A Simpson-Wentz insider tells The National Enquirer: “Pete wants Ashlee pregnant NOW. He wants a big family. And he’s adamant that the children should be close in age. But Ashlee is consumed with making it as a serious actress. Each time Pete brings up the idea of a new baby, Ashlee groans, ‘We just had one!’”

Simpson gave birth to their first child, son Bronx Mowgli, last November.

The insider adds: “While Ashlee does want more kids, she wants to wait a couple of years. It’s Pete who is getting antsy — and the baby issue is starting to create conflict. Ashlee worked hard to slim down and lose the baby weight after Bronx was born in November. She thinks another pregnancy now will slow her career momentum.”