Yes, I do think it's quite ok..and in fact, might be necessary. For someone to dissociate like this in therapy probably shows that those walled off memories are "kept" by you in another aspect of you... one part of you that knows all there is to know about those memories, perhaps the "one" who got you through them.

I think it's great that you are trusting both on your support team enough to share... and hope you work through the bad stuff quickly. ((((safe hug))))