Movie?

[Trip]

I caught this the other night on TV and kinda interested in seeing the end of it, but don't remember the name of it for the life of me.

A unmarried couple is kidnapped and kept in the basement of their kidnappers. The kidnappers son is really fucked up and likes to torture/kill the people they kidnap. The kidnappers are scary fundamentalist christians who can't have a baby and force the couple to have sex to have them a child. I think it's based in louisiana or a swamp.