I grew up in a small rural town in the 1950s and 60s and everybody knew there was something "odd" about me but there wasn't even a term for it then. My Dad was inclined to just let me be but my mom fought me tooth and nail every step of the way - hormones, therapy, etc. - and when SRS became available (1974) my mom said she would disown me and I was banished from my home town if I went through with it - I did - I had to! And I was banished and disowned. I left 24 years of life behind, all my friends, all my relatives, and left with only a suitcase.
It was an advantage, in some ways, to make a clean start after SRS, to start over where nobody knew me but it was also hard to do it with NO support, nobody to talk to, nobody to rely on, but I made it, through good times and bad. I only saw my parents twice after that, both times for a one-day visit, and it took 10 years to reconnect with my sister (our mom kept us apart until we figured out her game). I hoped that one day my mom would relent but she never did.
It took me 10 years to realize that my mom had NO RIGHT to make decisions for other people by banishing me and I started reconnecting with people from my past, letting THEM make the decision whether or not they wanted anything to do with me, and some of them did; a few old friendships were reestablished. Many years had gone by and connections had faded but I found most accepted me for who I am today. Nobody was particularly surprised - the most common comment was "It took you long enough to figure it out!" LOL!
Don't make the mistake I did in allowing "one family member" to make decisions for everybody!!!