Rape Is a Circle (2006)

Having no place to go after an ugly break-up with her boyfriend, the now-homeless young woman, Isabelle, and her best friend, Kerri, accept a generous offer for a ride and some food by the beautiful and seemingly innocent Good Samaritan, Kat. However, unbeknownst to them, their female benefactor is, in fact, a hardened sadist and a psychotic serial rapist, hell-bent on making them suffer beyond logic. Little by little, as the girls' lesbian captor forces her two helpless prisoners to perform hideous acts of extreme depravity on each other at gunpoint, somehow, the boundaries between abductor and victim will begin to blur. Can they flee from the endless cycle of pain and pleasure?