It depends on how hot the other girl is. LOL

I can not say it's NEVER justified. It's easy to say you should get out if you need to cheat but sometimes there are can be reasons I think but they also should be discussed first.

Was I cheating when my wife use to bring home HOT 18-20 year old girls for us/me to play with? yes she liked to play with them as much as I did and use to call me at work to tell me she was bringing someone home and for me to get off work early. hehehehe

Ahhh the good ol days.