This isn't the first time Lopez has said she's unsure about returning to the Fox hit. Earlier this month, she told the BBC she was on the fence.
A potential reason? The Hollywood Reporter has reported that her annual salary is $12 million -- but she could be holding out for Simon Cowell's $35 million a year salary, which breaks down to $642,201 an hour of air time.
She's also working with husband Marc Anthony and Simon Fuller's XIX and Endemol to produce music talent show Q'Viva!
Jennifer Lopez, Marc Anthony Announce 'Q'Viva!' TV Show
"That's kind of our goal... to make the most amazing Latin show ever seen. You know, it's such a tall order, we should stop saying that!" she told Extra.
She has hinted she may want to slow down. After a promotional tour in Europe to promote her new album, Love?, she told Extra, "My mom was with me and the babies and we had a good time. But it's tiring... those trips are tiring."