Lopez "crumbling" with motherhood

Jennifer Lopez reportedly believes that she isn't a good mother.

The singer and actress, who gave birth to twins Max and Emme in February, is allegedly struggling to cope with motherhood.

A source told Closer: "Jennifer wants to be the perfect mother, but she crumbles if any normal little thing goes wrong.

"If the twins cry, she thinks it's because she's a bad mum, and bursts into tears herself."

Lopez's perfectionism has prompted husband Marc Anthony to force her to spend time away from their children.

"Marc is concerned that she's not eating properly or sleeping because she's obsessed with looking after the twins," the source added. "If she leaves them with her own mother for a couple of hours to have some time off, she beats herself up about it and feels guilty.

"Marc has forced Jen to take some time off and have a massage to unwind, but she even struggled to relax during that.

"He wants her to stop worrying abut the kind of mother she's being and just enjoy it."