Have you read up on emotional affairs and how they affect the person who is caught up in those feelings. Your W may not be having physical sex with the OM. However, she appears to be amorous of her new found half-uncle who is her age. He, apparently, is not discouraging her. So, it is a serious situation, and could become even more serious.

You will need to be well grounded to maintain a sense of balance and sanity. It is not hard to get focused on what your W is doing, and get confused on what you need to be doing for you.

It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!