Khloé Kardashian hasn't been dating Tristan Thompson for very long, but the 32-year-old is already having to deal with her beau's upset baby mama.

The NBA player's ex-girlfriend Jordy Craig is currently pregnant with the 25-year-old's child, and isn't happy about his new relationship with the reality star.

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"She feels completely disrespected by him and Khloé," a source tells Life & Style. "Tristan would be with Jordy at the doctor's office, and he'd be off in the corner FaceTiming Khloé."

Adds the source, "It was absolutely infuriating to Jordy because she could barely get Tristan to focus on the birth of their baby."

The 25-year-old mom-to-be also didn't appreciate the duo's recent romantic getaway to Cabo San Lucas. "Jordy wants Khloé to back off," the insider says.

For more on your favorite celebrities, pick up the latest issue of Life & Style, on newsstands now! And scroll through the gallery below for photos of Khloé and Tristan’s first outing together.