How can i?

I saw what you did to my sister. Let's admit it: she's much more stronger than i am. I'm scared. You might push me away and disown me. You might sit in a corner and cry. You might slowly lose yourself thinking that both of your daughters aren't happy with their genders. I hope i could just step up and say "Mom, i don't want this anymore. I want to be someone else!" My sister might have done it, but me? i'm starting to lose hope. When can i tell you that i wanna be a transgender? and if i do, how can i?