I am so sorry that you had that response from her.
Do you think that she doesn't like to talk about it because as a child of someone who felt like that, it must be difficult for her, brings back unpleasant memories for her? That is NOT excusing her behaviour AT ALL. just a thought.

Sometimes we need to accept that the people that we most WANT to talk to about these feelings, wont/cant listen. In this case we need to find alternative sources of support. Do you have any one else that you can talk to?

I hope its OK if I send you huge hugs? ((((((((((((((((hugs)))))))))))))).x.