If your son doesn't have a strong relationship with his father, it might be really helpful for him to develop a secure attachment to a male T so that he can experience that kind of safe/secure relationship. I am wondering, though, if you have talked to your husband about his relationship with your son? Is he open to working on improving his relationship with his son? Is he in therapy? Have you considered father/son or family therapy? Unless there is a reason why your husband is unable to be a father, it seems it might be even more beneficial for your son to develop a relationship with his father. Having a parent who has little interest in your life and puts no effort into building a relationship with you can be incredibly damaging to a child. If there is any way to intervene there, it might be worth it.