And what if Celany doesn't want the awkwardness of having this communicated t him.? Without express directions, then the mutual friend would owe it to Celany to keep the confidence.
After all, Celany didn't say this directly to him; she made of point of having the convo when Eric wasn't around. So to repeat it to him is the height of rudeness to Celany.
It was less that I deliberately had it when he wasn't around & more that he literally walked out while my mouth was still wide open, catching flies.
Had he not walked out, I'm honestly not sure what I would have said to him, because "You are no longer welcome in my home" feels...weird. If I'd have been thinking quickly (and he hadn't gotten up & zipped right off), I think I'd have said something like "And on that note, I do thing it's best that you leave. I'll coordinate with Lia so that you don't join us any more when she stops by", because we're not FB friends & I don't know how I'd contact him otherwise (or want to, really).
But I can see how, if I deliberately had the conversation without him, it could be awkward if I didn't want him to know (like if I was worried about some kind of retaliation) or if I wanted to keep it confidential. But given the way he acted, I don't particularly care if he knows why I don't want him to come back.