My then-wife asked that we not talk negatively about each other. I foolishly agreed. The problems, which I didn’t realize until far too late, were that 1) it prevented me from talking about how I was feeling and made me feel isolated, and 2) I felt it prevented me from giving anything other than the most generic answers when people asked why we were getting divorced.
If I could go back and change things, I would make sure I didn’t agree to anything without sleeping on it. Or after agreeing to it, I would have talked to her about how it wasn’t reasonable to expect that of each other.