A 25-year-old woman named Kate Prichard from Murfreesboro, Tennessee got married this weekend to a 30-year-old guy named James Burton.

And after the wedding, Kate and James retreated to their motel room . . . where they got into an argument.

And it got so heated that Kate pulled out her nine-millimeter pistol . . . which she was packing UNDER her wedding dress.

Then she pointed it at her new husband’s head and pulled the trigger.  It wasn’t loaded, but then she put a bullet in and fired a warning shot into the air.

She was arrested for aggravated domestic assault.

(The Smoking Gun / ABC 7 – Western Tennessee)