Two bumps are better than one! Jessica Simpson and Ashlee Simpson are both ready for baby No. 3 — and trying to get pregnant at the same time!

"They both think it would be so great to be expecting together,” a friend of the famous siblings tells Life & Style. "They keep on talking about how it would be awesome to go through it all together."

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Once Ashlee, 31, who is already mom to son Bronx, 7, with ex-husband Pete Wentz, and 13-month-old Jagger Snow, with husband Evan Ross, suggested the idea, Jessica, 36, "got on board immediately."

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The singer turned fashion designer has a daughter, Maxwell Drew, 4 and son, Ace Knute, 3, with husband Eric Johnson.

For a look at their adorable kids, check out the gallery below!