Gaga Theory: Earth Mother / Ritual Concubine
My theory is that Lady Gaga is playing a Magna Mater / Earth Mother goddess sort of spiritual entity that was brought forth by Kathy Bates in an attempt to make the earth fertile so they'd have enough crops to survive the winter. Kathy makes a point of explaining the colony was running low on food, with women being given half-rations.
Her desire to keep her people from starving woke the spirit of the land, Gaga, who saved her from imprisonment by using an animal sacrifice, feeding her the pig's heart. As a spirit of fertility, she takes Cuba Gooding's character as her own, against his will, to draw magical power from the union. There's a long, long history of ritual sex in magical practice, with reenactments of Cernunnos or Herne the Hunter mating with an Earth Mother, to grant a coven power. And by long history, I mean both in Fraser's Golden Bough, and Gardnerian Wicca, and old Seven Arts / Hammer films from the 70s. XD
Just a thought! :D