The decision to call it a day is not yours to make. He already has made his bed and he is lying in it. Personal experience should inform you that telling him on his wife or confronting him will change nothing
Chisankho chothetsa sichopanga iweyo.  Iyeyo wapanga kale chisankho kwa amene akufuna kukhala naye.  Zomwe wadutsamo zikuyenera kukudziwitsa kuti kumuuza mkazi wake kapena kumulalatira sizingasinthe kanthu.