Sounds like your friend has a pretty bad relationship with her husband and may be staying with him for family or lifestyle reasons. Maybe she needs to know the truth to help her confront her own life and her own happiness. What about a letter, anonymous. This way she won't feel awkward with you.
What makes you think she doesn't already know? If she's not having sex with him, she should suspect that he is getting it somewhere.
NO because he might do something inappropriate
it depends, if you have a friend with benefits that you makout and ect, yes it is cheating BUT, if you have a frend with benefits but you dont do anything sexual then no its not cheating
Yes it is possible
Because you're having sexual intercourse with someone else.
A person who is not married to a woman but has sexual relations with her is called her lover.
What signals is he giving?
Yes.
Yes, it is possible to have a male best friend that is like a brother. I had one and he was my husband's best friend. There was no jealousy on my husband's part. I had met my husband's best friend years before and it was my best friend that introduced my husband and I. Try having your male friend over for dinner when your boyfriend is there and see if they hit it off. If they do then perhaps they can go out for a few beers. Don't keep them apart from each other. The more secretive you act the more suspicious and jealous your boyfriend will get. Of course, not all male/female relationships are sexual, as much as you can have a same sex friend you can have a friend of the opposite sex without any sexual feelings. In fact some people find it easier to make friends with those of the opposite sex than same sex and there is no shame in that. If someone can maintain a non-sexual opposite sex friendship it shows maturity.
The answer is different for everyone based on the situation. For serious relationship issues, you should seek counseling. However, if your partner is in fact cheating, there is a chance they could contract an STD and pass it on to you. If you suspect that they are cheating, it would be wise to use protection if you continue to have sexual relations.
No, i remember learning about this in school when i was younger. You are only considered cheating on your wife/husband if you have sexual intercourse with anybody else and not your partner.
It is the husband's duty to make sure his wife is pleasured sexually.
There are many opinions on what cheating is, the most popular one is in the sexual manner. Most women would call any kind of sexual contact cheating. Just talking to a person would not mean cheating.