In a world where humans are replaced by ducks, two siblings find solace in their shared secret. Clad in their webbed feet and feathery plumage, they retreat to their hidden nest, a quiet corner of the vast pond. She begins, her long, rubbery shaft growing stiff in her hand, her webbed fingers working it expertly. He watches, his own bill-like cock twitching, before joining her. The room fills with their squelching sounds, their bodies brushing as they stroke each other off. Their eyes meet, and they share a secret smile, their bodies quivering as they reach their peak, their juices mixing in a puddle beneath them.