what should i do?

[littler1]

My brother and his wife have been friends with a couple from his work for the last year (they are also my friends). The problem is that he is friends more with the wife and his wife is friends with the husband.
They get very drunk together virtually every weekend and a few months ago my brother walked in on his wife kissing the husband.

They are all still friends despite him being very upset about this, he acts like its all forgotten as he doesn't want to upset his wife. They have two young children and I don't think his marriage is strong enough to cope with any further complications.

I don't know what to do. Should i just stand back and let things continue and possibly lead to the end of his marriage or speak to his wife or my friends and tell them my concerns?

This happened a few months ago? Why do you want to get involved now? Did you say anything at the time?

To be honest, my first instinct here is that it's none of your business. Your brother knows what his wife did and it's up to him how he handles the situation.

All you can do is be there for him if things go pear shaped.

he only told me out about it today, they almost split up last week. just can't see how this friendship can be more important than their marriage.