to be honest, i'm not very sure. theres a old story which is below but maybe he didn't want to have the same fate as his son?
Son of Daedalus who dared to fly too near the sun on wings of feathers and wax. Daedalus had been imprisoned by King Minos of Crete within the walls of his own invention, the Labyrinth. But the great craftsman's genius would not suffer captivity. He made two pairs of wings by adhering feathers to a wooden frame with wax. Giving one pair to his son, he cautioned him that flying too near the sun would cause the wax to melt. But Icarus became ecstatic with the ability to fly and forgot his father's warning. The feathers came loose and Icarus plunged to his death in the sea.
The first one is 's . And the second one is just ' . Because ''our cousins'' definitely plural. So, we do not use ''s'' after the plurals for kind of these words.
