From what you wrote, i do not believe you were trying to be deceitful. . I think your cousin should have kept his mouth shut. I do not think secrets are good for any relationship. BUT what good came from exposing the truth. Everyone was hurt from the truth here. I am wondering what the real fathers agenda was since he has no intention of raising his son. I understand your husbands hurt. I hope you can get him to realize that you were not trying to hide anything. The sexual encounter happened before you met him and that you had not considered the possibility that another man was the father. I wish I had a "no fail" solution for you. I think only time can heal the wounds here. It will take a while to build trust again. I hope your love for each other is strong enough to rebuild what you had.