I feel (I know I should stop feeling for her) that she would understand me being distant doesn't mean I've given up hope for a R and that I just need time... I feel like if she thinks I'm done, then she would have no reason not to reach to OM for comfort, and she could use this time to get over him...
Ok, I just got trapped, she came into MBR and said that Son sees me ignoring her and he's going to start asking questions if I'm not at least courteous, I said I understand your concern but I need time.
Buddy, they had and still have sex. I am sorry there's no other way to tell you this other than being honest and straightforward with you. You're all going Wet Noodle here being afraid that your W thinks you're being distant when you should be A LOT more concerned about her wayward behavior. Time to reclaim your balls and get your mojo back.
I find it amusing that W came in the bedroom all concerned about how S would think....can't you see that it still all about her.
I would have calmly said, "Really? You could have fooled me right there considering that you're sleeping with a man who isn't your husband. I am not willing to live in nor stay in an open marriage. This is incredibly disrespectful to me and to our marriage. This is completely unacceptable. Get out."
I am now seeing W using her female wiles to get you to back down or back off so she can continue with the A unfettered....aka cake eating to her heart's content. You are going have to remove the fork: that is being a doormat Wet Noodle.