‘Southern Charm' Clash: Thomas & Kathryn Fighting Again After Repairing Broken Relationship

Southern Charm spoiler.

After months of coparenting in peace, Thomas Ravenel and his baby mama Kathryn Dennis are fighting again — and RadarOnline.com has the exclusive details about the Southern Charm costars' deteriorating relationship.

The ex-couple had been putting on a show off solidarity on social media, but the good times recently ended in a public spat.

Ravenel posted a photo on Instagram of their children, Kensie and Saint, with the caption “Me and the kids enjoying our last meal together before they’re off to school and then picked up by mom for her 7 out of 14 days. I’m going to miss them so much.”

Dennis commented in a huff, “Wow, a little specific don’t you think?”

Ravenel eventually deleted the photo.

“Kathryn texted Thomas to tell him to take the photo down. She thought Thomas was jeopardizing the kids' safety just to be mean with his comments,” an insider told RadarOnline.com. “They are not really getting along right now.”

While the Southern Charm season finale noted Dennis and Ravenel share 50/50 custody of the kids, the source told RadarOnline.com that the reality TV mom has not yet signed the court documents making the agreement with the children official.

“Kathryn is holding up the settlement," the source claimed. "She isn't making this easy for Thomas."

Dennis was in California when Ravenel posted the picture, and the source said her trip was a point of contention between them.

Ravenel is still under investigation with the Charleston Police Department after his former nanny claimed he sexually assaulted her.

“Kathryn is waiting until that gets resolved before she signs any papers,” the source told RadarOnline.com.