The model, who is pregnant with fiance Rob Kardashian's child, allowed her friend Paige Addison to borrow her BMW in November (15), but Addison allegedly drove past a stop sign and slammed into an SUV, injuring the two passengers inside.

Addison was subsequently charged with a felony hit-and-run.

In the documents obtained by TMZ.com, the unnamed plaintiff claims Chyna should have known Addison was a bad driver, and should have never given her the keys to get behind the wheel.

The plaintiffs are seeking an unspecified amount in medical expenses, lost wages and other damages.