Sorry Runningoutoftime, no, I think the sister was saying give up as in, let her HAVE her DIVORCE and get on with your life as a single person. Let go of any shred of hope in reconcilliation, etc.
Tha'ts the usual response most "friends" offer when you discuss your partner having an affair. It makes me sick because if the SISTER was being CHEATED ON that's not what she would want Buster to be telling her.
People are so hypocritical about affairs its tragic.
They never understand until they get hit with one...then all the lights come on about how sensitive and precious a household is, and important it is to nurture that same thing.
Don't give up, just do something different than what most people do. Never give up hope. Hope is inside of you, keep it alive as long as you want.