Tell her that you are sorry. Work up the courage to talk to her on the most intimate level. Open your heart and answer all her questions. Then, dig deeper, and truly share what is in your heart, the pain you have felt, and who you really are. Then tell her you love her.
She deserves that much. And more so, so do you. You are extremely fortunate to have a mother who wants to discuss this with you. It took me and my mother more than 15 years before we could discuss these things. It wasn't until after I could talk to her that I could feel released from the guilt and pain we've had.... now we have shared... and moved passed it.
My best to you. Enjoy your life.
Chin up!
Cindi