No. A husband with a cheating wife is called a cuckold.
cheating is doing anything you wouldnt want your wife/husband or girlfriend/boyfriend to know about
this is an easy question: see if he goes places alot and be on the phone too much.
It depend to how long and how it started, but yes she needs to confess to this woman. Especially if this woman doesn't know what's going on. And what about the cheating wife's husband, what did he do to be betrayed by her. If the cheating wife and the cheating husband are having a wonderful time hiding their affair, do remember what goes around comes around.
If you have absolute proof that your husband is cheating with this other woman then you should deal with your own problems with your husband first and yes, the other woman's husband should know. This is not an uncommon problem and most people (whether a husband cheats with another man's wife or a wife cheats with one of her friend's husbands) is very common and the victim of the cheating generally does tell the husband or wife that their spouse is cheating with their spouse.
Fool
YES.Cheating is cheating is cheating is cheating. They could be on the MOON and it would be NO different.
ask him
Getting offensive towards a cheating husband does not resolve the problem. If it is the wife that has caught him cheating then she can give him two choices .. seek marriage counseling and stop seeing whomever he is seeing or she will file for divorce. If it's a relative or a friend then they should talk to the husband and tell him that he has a week to come clean with his wife or you will say something, but it would be wise to also let him know others know about his cheating just in case he may seek revenge of his own to keep that person quiet.
In my experience, as both a husband and a wife, 100%
Don't count on dreams with such a serious issue such as your husband cheating on you. The subconscious can pick up many things during a given day or, you even watch something on TV where a husband has cheated on his wife and if you are not confident in yourself you could have a dream where your husband is cheating. If you want to know for sure because you heavily suspect he is then sit down and talk it over (good communication skills.) It is probably not likely he is cheating.
You don't. Stay out of it.