I see this time and again on MN.
Woman posts that husband is having an affair. She hates the OW and is very angry with her, as well as being angry with husband of course.
Then a load of posters pile in saying she should direct all her anger at husband, as he was the only one who owed her anything. The OW owed her nothing, so she shouldn't be angry with her.
I think that's wrong. We all owe our fellow human beings respect and courtesy. If I bump someone's car in a car park I should leave them a note. I don't owe them anything, I never promised I wouldn't bump into their car, they didn't put their trust in me not to bump into their car , I never promised to pay for any damage that I might do to their car. They don't even know me. But it's still my fault, my carelessness, and common courtesy dictates that I should leave a note and be held accountable.
Why is it perfectly fine to have a relationship with someone else's husband, knowing that you're going to hurt that person, just because they're a stranger and you never promised you wouldn't shag their husband?
Personally I think both parties are equally to blame, just in different ways.