I text my sister while she was out today, just got a reply
I sent this:
"im taking this opportunity to text you this while you're out because i suck face to face. just gonna be blunt! you may not be entirely surprised since the haircut. I'm trasgendered. I've sort of always known deep down. The reason I asked for a doctors apointment is so i can go i for gender therapy and hormone treatment. Clare and Carlos already know. Yes...im totally serious =P"
the reply:
"you idiot. im your sister and i love you. what ever makes you happy my little sis. thats all i want is for you to be happy. and hoover up...lol. it don't change anything xxx"
Excellant result

the only thing that could have made it better is if she called me "little bro"
and also not reminding me about my chores, but oh well