It's never bothered neither of them to have you watching or at least present at the house, while they would go at it...
That lasted until today, when she suddenly decided to spend some time with him in private. Maybe she's contemplating switching you for him? 🤔
Weekend planning done right! ;-)
Your wife can see how much it pains you that she has begun cuckolding you with someone you know, so she has thoughtfully decided that it would probably be easier for you to accept your new role in her life if you don't know anything more than that. That way, there will not be the problem of social awkwardness when you interact with the man she is now sleeping with -- because you won't know for sure who it is.
The message she is sending you by letting you see them together like this is that he is now the one she loves the most, while you are nothing more than her cuckold and she has no respect for you as a man.
Did she let you feel them or suck on her nipples?