Start documenting everything like this. It can be helpful should this proceed to full divorce with custody battles. To answer your question, every stitch is different. It may not be too late for you, but it is going to be a very tough battle. You need to lay out some serious boundaries, with some very serious consequences for your wife. For the first one, she needs to be told very clearly, you are not going to share your wife with any OM. If she is going to see another man, then maybe she needs to find another place to live, and your son will be staying in his home.
