In the fourth installment of "Primal Hearts," the adventurous duo finds themselves in a lush, secluded outdoor setting, their bodies ripe with desire. As they strip each other bare, the woman's ass cheeks clench in anticipation of the intense anal penetration she craves. The man, dominant and hungry, teases her tight hole with his tongue before sliding his thick cock deep inside. She moans, taking every inch, as he pounds her from behind, their bodies slapping together in the fresh air. As he nears climax, he withdraws, coating her ass in his hot cum, a primal creampie in the heart of nature.