I am struggling deeply with guilt regarding what I did to my affair partner's spouse, who was my best friend. My affair partner and I had a 2-month-affair and discovery was about 10 weeks ago. I have not spoken to my affair partner or his wife, my best friend, since then. I am in individual therapy and my husband and I are doing couples therapy as well as EMS Online. I plan to do Hope for Healing after EMS Online. We are doing well and I believe we are on a good path towards healing individually and together. The affair partner and his wife were our closest friends as a couple and she had been my best friend for 5 years. It's hard for me to even fathom how I did this to her and I feel terrible. I am struggling with whether to send her an apology and if so, when the right timing would be. I think I owe her an apology but I don't want to hurt her further. I have no expectation of restoring the relationship but I care about her deeply and want to communicate how much I regret the decisions I made and the pain they caused her. I've been advised to wait some time to give both of us some time to heal before offering an apology. Is sending an apology letter the right thing to do? And if so, is there a right time to do it?