Purg, Please get your mind focused back on you. If you make the OW a big deal, she will become more of a big deal. You can do this.
Also, think twice about involving your son in this. What if S says they didn't go to the gym, and H reacts and then S feels like he's done something wrong....
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss