Kourtney Kardashian and Scott Disick should be overjoyed by their latest baby bombshell, as In Touch can exclusively reveal the reality star is pregnant with her fourth child — only the father may not be her on-again boyfriend.

Before the couple announced they were back together earlier this month, the eldest Kardashian, 37 was hooking up with boxer and model Younes Bendjima, 23, who she was spotted with on Dec. 16 after a fight with the party boy, 33.

MORE: Check Out Kylie Jenner and Tyga's Sexy New Video

younes bendjima splash

Younes Bendjima.

“Kourtney has a thing for boy toys, and Younes is just her type. She’s been boasting to pals about his amazing six-pack, telling them she can’t keep her hands off his sexy body. Scott hit the roof when he heard she was hooking up with Younes,” says an insider.

It's no secret the reality star has a cougar reputation. Last year she was rumored to hook up with Justin Bieber, 22.

"She’s kind of beating herself up for ever getting involved with him in the first place, and not listening to her gut. She really regrets the whole thing,” a source previously revealed.

kourtney kardashian justin bieber splash

Meanwhile, Scott was linked to several women during his break from Kourt. She ended their nine-year relationship in July 2015 after he was photographed getting cozy with his ex-girlfriend and celebrity stylist Chloe Bartoli. He quickly fell onto a downward spiral and wound up in rehab, though appears to have cleaned up his act.

The couple has three children together already — seven-year-old son, Mason, four-year-old daughter, Penelope, and two-year-old son, Reign.

One way or the other, we're going to have another Kardashian to ~keep up~ with soon.

For more on this story, pick up the latest issue of In Touch — and for more exclusive content sign up for our newsletter!

itw cover