Dnester, your therapist has absolutely no business asking to speak with your parents, and the fact that she did this in addition to other questionable things she has done really makes me concerned for your therapy. Other questionable things - using EMDR to attempt to recover memories (that is absolutely not in any credible EMDR protocols), and suggesting that you have been sexually abused by your mother.

Can I ask what credentials your therapist has and if she is engaged in supervision or belongs to any licensing bodies?

From what you post I get the feeling you are quite vulnerable and open to suggestion because of your internal need to find a reason for your experiences. Combined with her questionable practises (in particular wanting to speak with your mother whom she has accused of sexually abusing you) I think you are quite vulnerable here.

I just... therapists just don't really ask to talk to relatives of their clients. That is way outside the boundaries of any reputable therapy. Something is really wrong here.