And alienation of affection is not illegal but Adultery is.
It's a misdemeanor, punishable by a $500 fine and up to 90 days in jail. And the law is rarely enforced.

And actually he can state what he wants it is a crime to Abandon your family. Your children. And he did that. Do you think any jury wouldnt agree?
It's only grounds for divorce.

Once again, alienation of affection is not a cause of action in NJ. That means that there is no law that permits suit against your husband's mistress (and even if there was, you'd need to prove that the breakdown of your marriage was entirely her fault). What makes you think you have any reason to sue the company they work for? Their employer bears no responsibility for their relationship.