Satan's Children (1975)

A low-budget horror about a young teenage boy named Bobby Douglas (Stephen White), preyed upon by his older stepsister Janis (Joyce Molloy) and bullied by his angry stepfather (Eldon Mecham), who Janis tries to alert to Bobby’s hidden stash of cannabis. Bobby escapes to the local bar, where a seemingly nice man offering him a place to crash ends up kidnapping him and taking Bobby to the country where he and three other men have their way with him. A bunch of Satanist hippies discover Bobby hurt and unconscious, and one of their members named Sherry (Kathleen Marie Archer) insists on taking him in. The cult leader Simon’s (Robert C. Ray II) displeasure with this choice leads to Sherry being punished, and when the rest of the cult turns on Bobby, he starts on a path of exacting bloody revenge on everyone who has wronged him, and therefore gain acceptance back into the cult. Joyce shows off her slender 70s bikini bod while sun bathing and is wearing a nighty when she’s abducted and eventually brought to the cult to meet her end. And peep Rosemary Orlando’s underboob 37 minutes in when she’s strung up by Sherry and the other members in just a lacy white bra and panties. That’s hella sexy!