| | Re: Wife stayed the night at another man's home
Move forward with the polygraph regardless of whatever else she admits to. Many a confession has been made in the parking lot of the polygraph place!
As others have said, I would still have MAJOR doubts about going forward in life with this person. She has (at the very least) shown complete disrespect and contempt for you by going to this dude's place anyway
Whatever you do, do not have children with this woman until you know what you're going to do with this marriage.