Zooropa,
I'm sorry it's so hard for you right now.
I've never heard of a rule like that. I'm guessing it is so that client's don't start SI'ing as a way to gain more of T's attention? And to allow you to talk to her would be kind of like a positive reinforcement. And she wants to give you no reinforcment because she wants you to stay safe!

It sounds like your T really cares about you a lot. And sometimes sticking to those kinds of boundaries and rules are the best way to show caring.

Be kind to yourself, ok?