I'm sorry you had to go through that, Comrade.
I've often felt that it would be really uncomfortable to bump into R.
I would hope that your therapist would have the presence of mind not to knock on your door, as that would be shaky in ethical terms, even if she isn't in therapist mode at that particular time.
Perhaps it could be session fodder for your next meeting, rather than an email?
__________________
'Somewhere up above the great divide
Where the sky is wide, and the clouds are few
A man can see his way clear to the light
'You have all the grace you need for today, and today is all that matters.' - Steve Austin