- No, stay out of it. Telling the in-laws their daughter had an affair is none of your business or their business. It's up to your son and daughter-in-law to resolve their own marriage problems. Smart parents stay out of their grown children's marriage problems.
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no,they may wish to know why she chose to have an affair and all sorts of personal intimate detalis about her husband may come up which may really embarass him.
he probably didn't look after his wife the way he should i bet he never provided her needs or was even abuseive.
thats often the case .