I wrote a very short letter to my wife's AP after D-day. I knew him before the affair. He replied with an apology. He also in the next sentence explained that he and my wife had been "trying to bring this nonsense to an end for some time". However, I had numerous text messages and Facebook messages that were entirely contrary to his claim to trying to end things. Very much opposite, he tried in earnest to keep the affair alive.
If you are a BS and get and apology from the AP, that's not a bad thing I guess. But don't expect it to hold much value. It certainly didn't for me. Any sincerity that there may have been in his apology, if any, lay in the shadow of his offense against me and his appallingly false statement in the very next sentence.
________________ Male BS D-Day 3.15.2017 Taking care of myself, as we all deserve to do. Encouraging all to bolster their: Emotional Health, Physical Health and Spiritual Health