Most therapists will wait until you bring things like this up yourself in session. You need to actually speak to her and discuss it, but the fact that you only mentioned it in email might be signalling to her that you aren't ready to discuss it face-to-face. Skipping a session isn't going to communicate that to her. I hope you will return and actually bring the subject up in session. She's probably waiting for you to bring it up in session (which is really the better place to discuss CSA than email anyway). Best of luck to you.