I have insisted on the no contact thing even though H thinks I'm going too far. We have changed churches so there is no contact that way. You all have confirmed for me that I was correct in this. I agree with no-contact policy. No, you're not overeacting at all.
All contact needs to be stopped with the OP from both sides.
Trust me, I have to see the OM everyday at work, it kills me everytime. I wish I could break contact with him, but I have to have the income. My W has broken all contact with him. I just wish I didn't have to see him everyday, and if I could I would leave. So look at the bright side, at least you can stop contact.