Jessica Simpson hates to leave children alone

Singer Jessica Simpson hates to leave her children alone and head out to gym or work.

The 33-year-old has two children - Maxwell, 15 months old and two-month-old Ace, reports femalefirst.co.uk.

"She would rather play with her kids than work out. She feels really guilty whenever she leaves them," a source told OK! magazine.

The singer goes to gym because she is desperate to lose post-pregnancy weight despite the fact that her fiance, Eric Johnson, is okay with it.

"Eric is so happy with his family he doesn't care about the weight as much as Jessica does. He tells her to stop putting pressure on herself. He says they can work out together, cook together and then the weight will drop right off," the source said.