Singer Kevin Jonas recently announced that he's expecting his first child with wife Danielle and has now opened up about the cravings she has been experiencing since discovering she was pregnant.

During an interview with People magazine, the 'Pom Poms' hitmaker explained that she's been suffering from bad morning sickness, but has started to overcome it and is feeling better:

"The nausea has finally subsided. Danielle's feeling much better now in the last couple of days, which is a really big step. She's not sick anymore. She can't stop eating them [grapes] - like non-stop."

Kevin Jonas also admitted that in order to prepare himself for becoming a father he has bought some appropriate books so that he can learn about what to expect:

"I've got a bunch of books. [I'm also reading something about] how to sleep a night after four weeks."