Joe Millionaire

Things are really heating up between 'Joe Millionaire' star Steven McBee and his new lover, Calah Jackson ... cause we're told they're gonna be shacking up in his new home.

ICYMI, Steven chose Calah and gave her a promise ring on the season finale, and he's already making an even bigger commitment by dropping $772,565 on a Kansas City, MO love nest.

Our sources say, Steven bought the place in his name, but the couple's decided to move in together. It's a bigger move for Calah -- she's from Dallas -- but they won't be too far from Steven's family in the rural town of Gallatin, MO.

We're told, the house is still under construction, but should be finished by the end of this month. These photos -- taken by photographers Mark and Cyndi McCombs -- of a replica model give you an idea of what their new pad will look like.

From the looks of it, it'll be pretty nice and they'll have lots of space in their 4 bedroom, 4 bath pad. It's a sweet "starter" home for the couple, but then again ... he's a millionaire.

The lovebirds seems to be having better luck than the other Joe on the show. As we've told you, Kurt has already split from Amanda, who he picked in the finale.

On tonight's finale of "Joe Millionaire: For Richer or Poorer" Kurt Sowers does find love, but TMZ has learned there's another plot twist -- one you won't see on the show.

So, this is where we give you the ol' SPOILER ALERT ... just in case you're on the west coast and don't wanna find out how it ends until you see it on FOX.

Alright, for everyone else ... here's the big upset news: Kurt chooses Amanda Pace in the finale, and not Carolyn!!! That's the first shocker, and the second one is ... Kurt and Amanda are already dunzo!!!

A source close to the former couple tells TMZ ... they called off their relationship back in December, not long after the show wrapped filming in the fall.

For those keeping score or laying wagers, the pairing only ended up lasting about a month and a half.

We're told there wasn't anything specific that caused the split ... instead, they simply realized their relationship wasn’t going to work outside of the show as their lives were heading in different directions. Simply put ... they just weren't a great match, romantically.

We're told it had nothing to do with the fact Amanda found out what viewers have known all season -- that Steven McBee is the millionaire 'Joe,' and Kurt is, well ... not.

And, just like that, Kurt's back on the market and looking for love. Our sources say he's confident he will meet the right person outside of reality TV.

Many fans of the show speculated on social media he'd chosen Carolyn, the other fan favorite. We know what you're thinking, but no ... we're told he's not rebounding with her.