Fertile for the Elder God by Adrian Blue

Rumble in the jungle. Scientist Lara stumbles upon a hidden, underground temple belonging to a lustful, six-armed god. He has awoken with only one thing on his mind. The ravishment of an innocent sacrifice. And unfortunately, the god has decided Lara will do nicely.

Heart pounding, Lara turned. She screamed at the sight of the giant, six-armed god towering over her. He wore nothing but an animal skin loin cloth, leaving the rest of his red skin bare. He took a step toward her. His bottom set of hands lowered to his hips to remove the only barrier between them.