So, I thought I would update my post.
This past weekend I was going to try to take back one particular sexual trigger that I have been unable to initiate since Dday. I didn't think I had any other triggers regarding sex. Turns out I do.
WH and I went away for the weekend and stayed at a hotel. (Backstory- WH and OW went from an EA to a PA while WH was on business trips and they stayed together at hotels.) The first night as we became physically intimate, the mind movies flooded in imagining them together. I tried to hold it together but began crying. WH wanted to stop and hold me but I told him I needed him to finish. I did not expect my reaction. It was basic sex that we have had plenty of since Dday but the setting was the trigger.
Afterwards, we held each other. I ended up telling him that I had planned to try to take back a trigger during the weekend but it wasn't that and now I didn't think I could do it. He was supportive of whatever I wanted.
The next time we had sex at the hotel during the weekend, it went much better and I hardly triggered at all. Hopefully, that solves that one and now I can try to work on the one that still eludes me. Perhaps we will have to practice at home first.
Thank you to everyone for responses. It really helps to be able to "talk" about these things with others who understand. I have no one IRL to talk to.