So SM, what if the only thing that happened was that your W had a "crush" on a guy, it was never physical... not even a kiss... but maybe they chatted all the time, she told him secrets, he to her his, she bought him cologne at random to let him know she appreciated him, that he sent her flowers once in a while... it was an EA... but not a PA...
Would THAT be a deal breaker for you?
I thought an A was a deal breaker for me... ANY type of A... and then I thought... maybe not... and then I was absolutely sure it really was and that an open M was a deal breaker...
An A that doesn't end... THAT is a deal breaker... really, it's not like there's a choice...