The Wicker Tree

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Beth is a successful pop singer and a devout evangelical Christian from Texas, United States. She was formerly a worldly pop singer, but later became focused on Christian pop music after becoming born-again. She and her fiance Steve both wear purity rings, and belong to a group known as the "Cowboys for Christ", who travel to "heathen areas" of the world to preach Christianity. The Reverend Moriarty (James Mapes) sends them off to travel to Glasgow, Scotland, hoping to save some souls once there. However, they are shocked when they receive a very negative reception, Beth even being set upon by a large dog.
After performing a concert at a local cathedral, the duo are approached by Sir Lachlan Morrison and his wife Delia, the laird of the small village of Tressock in the Scottish Lowlands. They invite Beth and Steve to come back with them to preach, but intend them for a more central part in Tressock's May Day celebration.
The villagers of Tressock have become infertile due to construction of nuclear power plant ran by Sir Lachlan. While riding a horse, Steve encounters Lolly, a female villager, bathing naked in a spring. They have sex on the banks of the spring. Steve begins to regret his actions, and wants to return home. During a flashback Sir Lachlan remembers a mentor from his youth (Christopher Lee).
Meanwhile, detective Orlando is sent to Tressock, posing as the local police officer, in order to secretly investigate reports of a Pagan cult. Orlando discovers that the people of the village worship the ancient Celt goddess Sulis from Lolly after having sex with her on multiple occasions.
Beth and Steve decide to begin their preaching at the May Day celebrations in the village. In an attempt to impress the locals, they agree to become the local Queen of the May and the Laddie for the festival, not realising the consequences of their decision and not knowing what awaits them.
Steve is chased by some of the villagers on horseback as part of a ritual. The chase ends at a dilapidated castle. Steve is torn apart by the villagers. Back in the house of Sir Lachlan, Beame the Morrison's butler, attempts to sedate Beth in order to prepare her for her role as the May Queen. He attempted to do so the night before, but the milk with sedative in it killed the Morrison's cat named Magog. Beame is attacked by Beth. She flees, but is captured in town. After discovering Steve's death, Beth confronts Sir Lachlan at the wicker tree. Beth pushes Lachlan into the structure and sets it on fire killing Lachlan in the process.
Beth then tries to escape from Tressock with the help of one of the few children left in the village. She is captured and is later killed. Her body is preserved and is put on display in a room with the previous May Queens. Lolly gives birth to Steve's child and brings a new generation to Tressock for the first time in years. Delia prays to setting sun for the gods to find more men to bring to Tressock to sire more children.

Question: Beth and her fiance Steve both wear purity rings, and belong to a group known as the "Cowboys for Christ"?
Answer: Yes they are part of this group.