Birthday girl's present? A painful, pleasurable anal initiation. She's nervous, but eager to please. He teasingly lubes her up, then slowly pushes his cock into her virgin ass. She gasps, her body tensing as he stretches her wide, gaping her holes. Pain turns to pleasure as he fucks her harder, her body responding with slick lubrication. He pulls out, coating her ass with his creamy load, her birthday gift complete.