As though Jessica Simpson's weight loss struggles hadn't given the new mom enough bad press in recent weeks, a new report by Radar Online claims Jess' unemployed baby daddy may be stepping out on her with none other than his ex-wife.

Reluctant as he seems to put a ring on Jess, unemployed opportunist Eric has taken a trip down the aisle before, with LA stylist Keri Johnson. Friends of Keri's claim that Eric's relationships with Jess and Keri overlapped (Eric met Jess at a party where he'd brought Keri as his date) and there may even still be something going on between the exes.

“He’s a two-timing cheat!” says one insider. "He’s already cheated on her once — he’ll most likely do it again.”

For the sake of Jessica, her new baby and her Weight Watchers campaign, we hope this rumor turns out to be false. Jess seems like a girl who tends to eat her feelings.

(Photo: Fame/Flynet)