Kelly Osbourne wants to have children with her fiance Matthew Mosshart.

The 'Fashion Police' co-host admits she is eager to start a family with the vegan chef but only wants a few kids because she doesn't want her body to change.

The 28-year-old star told the July issue of U.S. Cosmopolitan magazine: ''I do want babies, but I don't want a great big vagina.''

Kelly is happier than she has ever been before in a relationship because she claims Matthew isn't trying to use her or her fame.

She explained: ''He just wants to love me, and I just wanted to be loved by him. Every single other guy I've dated has wanted something from me. They'd call people I know and ask for favours.

''I'd have to say, 'Trust me. Telling someone you are my boyfriend isn't going to get you very far.'''

Kelly - who has been in rehab twice before - also praised her mother Sharon and 64-year-old father Ozzy Osbourne, who has vowed to get clean and sober for her wedding, after recently becoming addicted to prescription drugs for 18 months.

She said: ''I love and respect that he's honest enough to say, 'Yes, I did this. It was my fault.'

''He's a real man. Most people would hide, and he doesn't. It doesn't make me love him any less. It took a long time to get to that place, but I understand it now.

''And my mother does too. We had a TV show about this. Now people are trying to act like it's a new story.

''He's an addict; I'm an addict. It's going to be one of those things we battle for the rest of our lives. I take the necessary precautions. If you're not happy and healthy, it's not worth any of it.

''Everyone says sex, drugs, and rock and roll are fun. It ain't fun. It is not something to glorify.''