Share 'spotted with another woman'

i need to know what to do- almost 2 months ago, my friend spotted my husband with another woman at a coffee shop. At first my friend thought the woman with my husband was his mother, with a new hairdo. but on inspection she realized it was not my mother in law, but a woman in her 40's. My friend said her heart was racing and she didn't know what to do, she was sure it was him. my friend told me a…