Your brother and sister in law have been married for four years and they have a two year old child. Your brother is often on the road for work and he's suspicious that his wife may be having an affair with another man.
You've just confirmed this is true because you caught your sister in law in a lie about a secret rendezvous she had last week. She begs you not to tell your brother and claims that it only happened because he is away all of the time and she was feeling especially sad and lonely.
Even celeb couples can not withstand distance sometimes. Kate Hudson and hubby rocker Chris Robinson seem to have separated during his most recent tour with his band. She seems so be finding solace (and sun) with co-star Owen Wilson here in Hawaii. Would you tell your brother about the affair or not?