I'm not trying to hide something from him because I'm up to no good, I'm trying to keep him from getting hurt.
That's not your job. He's an adult; he's not your child. You said you don't want to make him unhappy, again not your job. You aren't responsible for his emotions. You aren't responsible for hurting him. If anything, he should have some anger at the OM for stalking you.
I do think any method OM has contacted you recently, phone and email you should change that info. If he ever calls your house change that # too. You are protecting your family from a predator, I do believe that. OM is not respecting you and your family.
I think you should immediately change your cell & email, and then tell your H he contacted you and you have changed both in an effort to stop the stalking. If he contacts you again, I think you should even possibly let him know him you will seek out a restraining order or charge him with stalking or whatever to let him know you mean business.
