Penal Island

When two escaped convicts find refuge on a deserted island, they think they are alone until they discover a woman on an abandoned ship.  They take her to their makeshift home and do with her as they please.  When they later discover her dead at the hands of presumed cannibals, they try to escape the island but find themselves in a situation worse than prison.  Their carnal desires, previously kept in check, surface quickly again on Penal Island.