Tristan Thompson, 25, may be expecting his first child with ex-girlfriend, Jordy Craig, but that hasn't stopped the NBA player from getting hot and heavy with new love, Khloé Kardashian.

And the athlete's baby mama isn't happy about their super public romance. "Jordy wants Khloé to back off," 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."

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As her due date inches closer and closer, the 25-year-old mom-to-be wants Tristan's focus to be on their unborn baby and not the 32-year-old reality star.

"She feels completely disrespected by him and Khloé," the insider adds.

For more on Khloé’s relationship, pick up the latest issue of Life & Style, on newsstands now! And scroll through the gallery below for photos from the couple’s first outing.