My husband had an affair and now his lover has died should i forgive him?

DO NOT do that "for your kids." My parents used that excuse with me and my siblings, yet we're all grown up, they're still married and they still hate each other. DIVORCE HIM! He cheated on you, and since he admitted to the affair, you can make a killing in a divorce! Infidelity always looks good in court if your spouse cheated on you, especially if you have a bunch of kids. You and your kids will be taken care of financially, and who's to say you won't meet a wonderful man who really loves you and won't cheat and will love being a stepfather to your kids? In the end, your husband is the one who will lose. In fact, I'm surprised you stayed with him even though you knew about it.