OK, I understand the logistics of needing to tell your W that you will be unable to watch the kids on Thursday evenings. Did you openly tell her WHY you are unable to watch the kids those nights?

Do you get anxiety when you notice your W getting a text, regardless of whom it might be from?

Do you get anxiety when you notice your W is actively texting in a conversation, regardless of whether you know it is OM or not?

Can you differentiate between a text from OM and a text from anyone else?