Glad to hear that you’re leaving the OW behind you. I hope that what you did will make her a better person. Yes, she is pathetic. In that respect, I pity her. Perhaps seeing up close what her behavior has done will make her stronger. Strong enough to resist her urges, and strong enough not to seek pity from men because she’s “lonely.”
I fully understand what you’re saying about feeling different when your H is around. I go through the same thing (albeit for different reasons). Guess our negative feelings melt away when we see the human being, with all their weaknesses, instead of the fearful person of our immaginations.
My sense is that your anger won’t spiral uncontrollably. You don’t want that to happen, so it won’t. You have more control over your feelings than you think, and over time, the positive will overcome the negative. You’ve built a wonderful life, have a great family, and even after all this there is still love and friendship between you. It will last. No Question