MORE drama brews for Kourtney Kardashian and Scott Disick!

Two months after the longtime couple split, a new report claims the 32-year-old did not father 11-month-old son Reign.

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My RAD little bunny.

A post shared by Kourtney Kardashian (@kourtneykardash) on

"There’s been buzz in their circle that Kourtney cheated and Reign might not be Scott’s. He flipped when he heard it, and he’s been off the rails ever since,” a source told OK! magazine. "He’s behaving strangely. There’s definitely something going on.”

The 36-year-old allegedly dumped Scott, who is the biological father to their kids Mason and Penelope, after photos surfaced of him getting close with his ex-girlfriend in Monte Carlo.

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Smiling.

A post shared by Kourtney Kardashian (@kourtneykardash) on

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“Everyone’s been saying, ‘Poor Kourtney,’ and she’s been made to look like the innocent party. It’s pretty harsh of her to make him take all the blame for a situation she may have had a hand in,” the source continues.

Guess the only person we should be feeling badly for is little Reign.