The crackhead nurse with the tit tattoo is a disaster.
I get that they are trying to use her as the show's "Fiona", and while Fiona on burn notice was kind of a psycho at times, Nurse Tit-Tatt is basically a holy terror.
Not that the Seth dude was cool or anything but smacking around his girlfriend is not that same as what Nurse Tit is doing. She is actively running around terrorizing people, she's kind of like a white trash hurricane.
I don't know if they intended her to come off that way but that's how it seems to me it's actually pretty funny.
J.