Why not go for six?
Their May-December coupling has outlasted many a Hollywood marriage — especially with the rush of breakups this year — and now Demi Moore tells Vanity Fair she and Ashton are considering having kids.

Why? Because "Once you hit three, where you’re outnumbered, it’s really, like, ‘What’s the difference between (three or) four or five?,"’ she said.
Uh… ok!
She also adds her unique spin to contemplating her own relationship.
"If somebody would have said, ‘O.K., here is the prediction: You’re going to meet a man 25 years-old, and he’s going to see being with you and having your three children as a bonus,’ I would have said, ‘Keep dreaming,"’ Moore said. "I think it caught us both by surprise, particularly him."