Gina, I'm so sorry your Mom is treating you like that, sister too. You could try the tack that they love your soul, and that has not changed. Just the outward trappings. Try the example from the "True Selves" book.. take your favorite novel, put a new cover on it.. the novel remains the same, it just looks different. It is still -you- inside, just the wrapper has changed.
My mom is not accepting of me either, I suspect there are more here that are not accepted by family, than are. It is heartbreaking. My sister (9yrs younger) initially was supportive, but now says I can not talk to, or interact with her kids anymore. Mom constantly prays and thinks I have been duped, led astray by my therapist "who only has her agenda, to take my money and say whatever she has to, to keep me going along my path to a sex change.." ( <-- insert eye roll here). Dad passed last year, but I pretty much know how he would feel, and say. That is sad also. But you have a terrific support system here, friends, sisters, brothers who know -exactly- what you are going thru. And how difficult it is. Family just does not understand that we are literally willing to (and most of us end up) giving up family to finally align our outside, with our insides. The highways and roads are littered with the remains of familes left behind because, for our own sanity and healing, if we can not be accepted as we feel, we must then go on this journey without them.
But we know, that time.. time by itself, can both, heal the wounds on each, and close the gap between us and those we love. Time can allow our families to see how much better we become after our journey.
I pray for you and your mom, that you find the solace to be strong, and for her, to find the love she has for her child, not son.. or even daughter, but child.. Maybe, when she realizes she has to rely on your help, a little time apart can help her get over her shock and sadness and see how happy you can become.
Hugs for you!!