Kelly Bensimon has jitters about moving in with fianc Scott Litner

“Real Housewives” star Kelly Bensimon is about to be a real housewife. Or, at least, a real wife. But she tells Page Six she has some butterflies about it all.

Bensimon has put her downtown apartment up for rent — for a whopping $28,500 a month — and moved in with her fiancé, financier Scott Litner, on Tuesday, we’re told.

“I am really, really excited to move in with him,” she told Page Six at designer Dennis Basso’s Fashion Week show.

But says she is dealing with jitters.

“I am really, really nervous to move out of my old apartment,” she tells us. “I am only renting, but still there is something to be said about this life that I created for my girls on my own,” says the single mom of two.

“I am so proud to have raised them and financially provided for them on my own. It’s very strange to be moving in with someone else,” she told us.

Bensimon, who was married to fashion photographer Gilles Bensimon for ten years, has daughters Sea, 25, and Teddy, 23.

She got engaged to Litner over the 4th of July at Lake Geneva in Wisconsin after a year of dating.

The “Real Housewives Ultimate Girls Trip: RHONY Legacy” star put her apartment at the Beaux-Arts Police Building at 240 Centre St. on the rental market in August.

Litner also has children.

“It will be a blending of all the stuff,” she tells us, saying when it comes to decorating, “I guess I am going to go with a nest vibe. All these little ducklings in one big nest.”

The wedding is being planned for next March or April and Bensimon has a dream wish when it comes to her dress.

“I really want Calvin,” she told us, clarifying, “Not Calvin Klein [the brand], Calvin [Klein the person] himself. . .  When I think of wearing the most beautiful dress in the world, it’s Calvin for me.”

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