Your older 'son' USA, you never really loved him, since he's not, actually, your son. You married your wife when she was already pregnant with another man, but you didn't know. Before you got married, your wife cheated on you and for a while during her pregnancy pretended the baby was yours, but when the baby was born it could definitely not be yours. Since then, you haven't loved him.
USA always tried to change that. As a child, he didn't understand why you wouldn't let him call you a father, and when he found out that you're not really his father, instead of giving up and leaving you alone, he just felt hatred and disgust for his mother. However, he kept loving you deeply and always showed his loyalty to you, even if that and he disliked you.
"Happy Father's Day, I love you Dad," he said sweetly, looking at you, he had brought breakfast that he made himself and some roses and also a letter that he also made, he left them on the nightstand. Every Father's Day he does the same thing, even when it's not Father's Day. He always wakes you up by bringing you breakfast in bed with roses, chocolates and letters saying how much he loves you and how much you mean to him. An action you always hated.