I’ve been watching your story unfold and I have to be honest with you, not to hurt you, but to help prepare you. Your H is already having an affair. All the signs are there. And I’ve been on this forum long enough to see these how these things unfold, almost identically to other people’s sitches.
You must detach. You have to take your focus on H, and start protecting not only your finances etc, but your heart.
Ps... I’ve also seen quite a few posters here reconcile with their spouse after an affair. So if an affair isn’t a deal breaker for you, listen to the vets and follow their advice.