Karen Freida Samson

True to her name, Karen is first encountered as she is cursing out Mila at the local coffee shop because her complicated order wasn't done to perfection. (It is at this time she states her full name as if that should be immediately recognised and deferred to.) When she threatens to use a strap-on(!) on the poor girl, MC intervenes, drags her to a toilet and gives her a spanking to teach her a lesson. He then proceeds to have quite rough sex with her to give her a taste of her own medicine. (According to Mila's later statements, Karen does becomes a much nicer customer after her "lesson".)

Despite her anger management issues, Karen turns out to be quite the submissive, getting off on the spanking and MC's further degrading sex with her. She also reveals that her fury was mostly because she had just found her husband banging their dog-walker and admits to taking it out on the poor coffee girl.