So, as the title suggests, does it matter if the other woman was your friend?
From personal experience, I think it does.
It was a double betrayal, and to make matters worse, I didn't find out till years after the event.
She continued to be my close friend after the affair with my husband.
He's now ex of course!
She's ex too.
The pair of them, right in front of me but I couldn't see it.
Caused me so much pain.
I can't even begin to explain.