Ashton Kutcher Insisting Pregnant Mila Kunis Juice

If you're one of those people who always figured you'd be totally willing to let Ashton Kutcher father your baby, well, you may want to think again. Sources tell Radar Kutcher is driving pregnant fiancee Mila Kunis "insane" by trying to dictate her diet and exercise choices ... and "sulking when she blows off exercising or juicing with him," says one. "Ashton has always been weird about Mila’s diet, even before she became pregnant ... Ashton is really hard on Mila but it’s also because they have known each other since they were kids. So there has always been a weird, and sometimes mean, brother-sister dynamic to their relationship."

Meanwhile, Kunis has something to say to other soon-to-be baby daddies out there: "Stop saying 'we're pregnant,'" she pleaded on Jimmy Kimmel Live last night. "You're not pregnant. Do you have to squeeze a watermelon-sized person out of your lady-hole? No. Are you crying alone in your car listening to a stupid Bette Midler song? No. When you wake up and throw up, is it because you're nurturing a human life? No. It's because you had too many shots of tequila. Do you know how many shots of tequila we had? None. ... You're not pregnant. We are." (More Mila Kunis stories.)