Rosie Huntington-Whiteley can't decide if she is ready to have children yet.
The 25-year-old model is being pressured by her boyfriend of three years, actor Jason Statham, to start a family, but isn't sure as her career is going so well.
A source told the Daily Star newspaper: "Jason is broody, and has made no secret of his feelings. Rosie wants to have his kids one day, but isn't sure now is the right time.
"She's getting movie roles and advertising deals and feels her career is at a peak."
While Jason, 45, may be eager to become a father like his showbiz friends - even leaving rooms in the couple's houses in New York and Los Angeles to be used as nurseries - he can also see things from Rosie's point of view.
The source added: "Jason just doesn't want to be an old dad. He's seen pals Guy Ritchie and Vinnie Jones become fathers and he's really jealous of them.
"He doesn't want to be seen to put pressure on Rosie, as he understands she's still young and has respect for her and her career. He is used to getting his own way though."
Rosie has previously said she is open to the idea of becoming a mum, but wants to continue her career at the same time.
She said last year: "I always see myself working, but definitely being a mum will be a big part of me. I think my career is very self-indulgent. It's all about me.
"I'm not a doctor, I'm not looking after people, I'm not saving children. I'm in the entertainment business. I'm a model. I'm an actress. So it is very self-involved.
"I think there is naturally a point where you think, 'I don't care about myself as number one any more. I want to care about other things.'"