Last year after three months of darkness in my life, I decided to file for divorce because I had confirm my suspicion that my stbx was cheating behind my back. I found numinous hotel cards in her back after night out and also have a voice recording that I placed in her car to confirm my suspicion.

We are close to finalizing the divorce through a mediator, and I have not told her the real reason why I wanted a divorce although I did say she is better off with someone else because our marriage was on the rocks a few years before, and I knew it was not meant to last. I do want to let her know that I know she cheated because she is oblivious to what she did as a possible reason for the divorce. How do I subtly tell her without getting into an argument about it.

I have it in my head that once we sign the divorce papers, I would simply hand her a stack of hotel cards and condom and tell her these are hers.

Any other cleaver suggestions even if they are for shits and giggle?