Pregnant Mila Kunis' baby bump is getting bigger by the minute. It sure looks like the "Jupiter Ascending" star is about to pop anytime now.

However, new reports suggest that the A-lister might have problems with her fiancé and "That 70's Show" co-star Ashton Kutcher. The report claim that Ashton might be cheating on Mila, and the two might be headed for splitsville.

To make matters worse, rumors start to speculate that their planned wedding after Mila gives birth might not push through as well.

A source told Star:

"Ashton and Mila have been fighting nonstop; it's gotten really bad. They've always been very passionate, but now that's turning into a lot of yelling. They are both having a really hard time tolerating each other's issues."

The tabloid goes on to report that the World Cup might be the reason for their recent fight.

"[Mila] told him that he'd better sell his World Cup tickets, because there was no way she was going to allow him to go. Ashton loves sports, and those tickets were hard to come by. He couldn't believe that she would tell him he couldn't go to an iconic event that only happens once every four years! So Ashton told Mila he was tired of her controlling his every move."

Ashton Kutcher and Mila Kunis plan to get married after giving birth. Perhaps it's a personal choice of the "Black Swan" star so she won't have to think of a huge baby bump on her wedding day.

Just recently, pregnant Mila Kunis and Kutcher purchased a 7,351-square-foot mansion in Beverly Hills for $10 million.

Their new house reportedly "sits on about a half-acre of land in the hills and boasts four bedrooms and three bathrooms, and it offers plenty of privacy."

Stay tuned for more pregnant Mila Kunis and Ashton Kutcher news right here!