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Hi there conigogo!
Actually your T is correct in saying that the more you talk about it, the more you will heal. It is a process called catharsis or abreaction wherein you are disclosing some of your past experiences - be it good or bad, to your T. I believe that the reason why you are feeling that way is that somehow, you have this hostile feelings towards your mother which was suppressed and needs to let it out. Thereby, allowing you to feel that way. Although you have mentioned that the both of you had already patched things up, it still played a very vital role in which who you are and what you are right now. Just trust your T about this, and eventually, you will subtly notice that you are no longer feeling that way. Keep it up and always be safe...

