The OP illustrates the onset of sh*tty/disrespectful behavior. Thereafter, should OP fail to OVERTLY inform his plate of HIS rules of engagement, this type of behavior will merge into the existing "rules" of play by default, only to aggrandize in severity, eventually compromising the frame.
Motive: The plate unconsciously tests her subject to observe of what type of substance OP is made.
Prescription: Apprise plate that outbursts are unwarranted and not acceptable. Should another outburst occur, OP must walk away.
DJs don't accept sh*tty behavior; they live by their rules of engagement, not others'. As rules are individualized, and thus vary, overt disclosure of boundaries should be implemented in all the disparate types of relations: friendship, plate, exclusivity, or marriage.