and if he does send you a response to this email, i want to be the first one to call BS on his boundary rule

sarcasm aside, good for you for standing up for yourself and for what you feel is important to you! ex-T did something similar, where he suddenly change a boundary without pre-discussing it, and the rupture it caused definilty lowered my trust and changed my perception of him. the relationship was never the same after and it did have a detrimental effect on my therapy and the relationship with him. it too was one of the many reasons why i decided that i wanted to work on getting myself un-attached to him so i could end therapy and get myself out of that 'relationship' with the least amount of hurt and damage to myself.

all my best to you