Jennifer Aniston and Vince Vaughn: Marriage or Just Having Fun?

Close friends of the actress have declared that Jennifer is not yet to settle down. So what kind of relationship is she having with Vince Vaughn? From "just friends" to "marry this winter", everything has been said about them. But there is something unsaid still: "just for sex and having fun".

The source quoted by the Star magazine says:
"They're just having lots of sex and Vince knows how to turn her on. She's flat out said several times Vince is not marriage material."

Rumors also say that, in spite of not wanting to marry him, Jen still wants to have Vince's children.

She has declared in an interview for GQ that, in five years time, she sees herself married with children.
"In five years, I would hope to be married and have a kid. I still believe in marriage 100 per cent."
Does that mean Vince is not the one?

He had proposed her one morning, after the "Friends" star woke up crying for joy. She had just dreamed that Vince was "the one". When she told him the story, he decided that there couldn't be a better moment for proposing and did it.
So is there a wedding in December or not?