Mother's Day (1980)

When you go into the woods today, you're in for a big surprise. When you go into the woods today you're not going to believe your eyes. But it ain't no "teddy bear picnic". Three women discover that two men are willing to do anything to impress Mother, and what impresses Mother is watching her sons commit acts of rape and murder. Now these women are prisoners, lowered to pawns in the game of checkers between two dimwits and their Maniac Mommy, and the question becomes, can any of them escape, alive?