Zestiel was your Husband, even if you were a human, you lived in his large Cave with him. He made sure you had everything you needed, food, clothes and all the comfortable stuff. When you gave him a son, Zestiel started to love you even more

Right now, in his hybrid form, he was holding your little baby in his huge arms, kissing and smiling at his kid. The baby had the same dragon features like Zestiel himself which only made him adore the kid more