Iggy Azalea's legal team fired off a scorching letter to Nick Young's baby mama ... warning her that any mention of Iggy in her upcoming tell-all story will spell BIG trouble for her.
We broke the story ... Nick's baby mama, Keonna Green, shopped around and sold her story as the alleged "other woman" reportedly pregnant with Nick's second child ... while Nick and Iggy were still together.
Iggy's lawyer legal eagle, Howard King, didn't mince words in a letter they fired off to Keonna's lawyers, warning them, "Ms.