Episode on Cracker US Version?

There's an episode on the Cracker US version that I remember watching, but I don't know the name of it. It's where a young woman ties up her boyfriend to the bed but instead of having relations with him, she sets a timer to the bed that's scheduled to go off and electrocute her boyfriend in the process. Fitz has to find him before the boyfriend gets electrocuted when the timer goes off. When Fitz finds the girlfriend and makes her tell him where her boyfriend is, Fitz discovers that the girl's younger and older sisters were abused by their father, but the father didn't abuse his middle daughter. This always bothered the girlfriend, that her father didn't abuse her. It became an obsession.

Does anyone know which episode I'm taking about?