Erica, the young, sultry sis-in-law, catches her brother-in-law in the act, his hand down his pants, humping the air to her panty-clad image. "Hey, Erica!" he blushes, "Guess what?" she teases, sauntering closer. "You're horny, and I've got just the thing to help," she purrs, pushing him onto the bed and spanking his bare ass. "Fuck, that's hot," he groans, as she grinds her panties against his throbbing cock, driving him wild with desire.