Terri Seymour thinks relationship with Simon Cowell will end when she decides to start a family

Simon Cowell's girlfriend Terri Seymour believes her relationship with the 48-year-old pop mogul will come to an end when she decides to start a family.

Model Teri, 33, who has been dating the millionaire American Idol & X Factor judge for 5 years, told Hello magazine: "I've known his thoughts on marriage and babies from the beginning.

"He doesn't want kids, full stop...I would definitely love to have a baby. Not now, because it's so busy. I love my job and I wouldn't want to give up what I'm doing. But in the future, definitely."

Terri, who was then asked if it felt strange she might dump Simon one day, said: "Because everything is so amazing, I haven't allowed myself to think in that way yet. Maybe I will, shortly.

"It's not something I am worrying about right now. Definitely in the next couple of years, I'd have thought."

Seymour, however, insisted that she and Cowell are happy, despite reports suggesting he's romantically involved with his fellow 'X Factor' judge Danni Minogue - after photos surfaced of Simon clutching the Australian singer's hand.

She added: "I would never try and change Simon. I love him for what he is - believe it or not! I have to trust him because I'm away so often, as he has to trust me. If I knew in my heart he'd been unfaithful, I wouldn't stay around."