As Jessica was not yet pregnant, Hank was afraid that his relationship with Sonny would become increasingly distant.
That was especially so when he saw Liberty and Duncan together. Even if he felt that Duncan could not possibly like Liberty, he was still worried that his son would call another man “father”.
He wanted to take the opportunity to take Sonny with him and raise him for a period of time, so as to cultivate their relationship as father and son.
He wanted to let Jessica get along wit