The nephew's innocent eyes glow with mischief as he takes his uncle's rigid cock into his warm, wet mouth. He licks the shaft, tracing the veins, his tongue flickering over the sensitive head. The uncle, his breath hitching, watches as the nephew's lips stretch to accommodate his thickness. The nephew's inexpert yet eager sucking elicits guttural moans from the uncle, who can't help but thrust gently, fucking the nephew's mouth. The nephew gags, his eyes tearing up, but he doesn't pull back, determined to take every inch.