I have been friends with a co worker for years. She was my boss at one time before we down sized. She came back in 2016 in a new position, and we have grown really close. She invites my wife and me to all her family events. We genuinely care for each other like family. We have always talked about our problems and couple weeks ago she said her husband couldn't perform in the bedroom. He is 10 years older than her so I confessed my wife had lost her sex drive for the last several years. She expressed her concern and I did too. We went out after work for dinner and drinks got pretty drunk. Next thing I knew we were kissing and ended up having sex. It was great sex for the both of us and we don't want to leave or hurt our spouse or ruin our friendship. We care about each other but decide no more sex. Did we do the right thing by not messing around anymore?