Squealer (2005)

A quartet of women on a road trip experience car trouble, and seek shelter in a seemingly abandoned farmhouse, where they have an orgy. The girls are interrupted mid-coitus by the home's owners, a group of hillbilly cousins who make the travellers have sex with them. Afterward, two of the women are tied to chairs and placed in a boathouse, though one of them manages to free herself, and undo her companion's ropes. While those two have sex, they are spied on by three of the rednecks, who eventually join them. Outside, one of the girls has been tied up and placed in the back of a truck. While her abductor digs a grave, the woman tries to make a run for it, but she is quickly recaptured. The girl is taken back to the house, where she and two of her friends (one of whom is placed in a swing) are used for sex. Next, a female member of the backwoods clan has sex with one of the girls, choking her and suffocating her with a bag during the act.