I will not judge you becasue I am not "in your shoes"
And I am sorry I can not give you any constructive advice.
All I can say is..... Your wife spending the night was not right... and I FEEL a "In your face" full of dis respect for you. if you have set any boundaies they are made of straw buddy
I would like to add to Lanzo's A real boundary would have been, "I understand he is hurting and you want to help. I won't share my wife with another man, especially to spend the night. His problems are his problems it is not appropriate for you to get involved. Feel free to spend the night but if you do then plan on packing your things when you get home. I AM SO SORRY Doc
And if I claim to be a wise man, well It surely means that I don't know