Ashton and Demi unsure over kids

At one time it did look like Ashton Kutcher, 26, and Demi Moore, 41, were definitely heading for the altar, despite their age difference. So what happened?

“Kids are a huge issue,” says an inside source, according to the National Enquirer. Kutcher loves Moore’s three daughters (from ex-hubby Bruce Willis), but he would like some of his own one day.