Hi, I have the same issues with my sister. My sister told me to get a personal trainer and if she could lose weight (she only had 10 to lose) that I could as well. She was very rude to me when I told them I had been considering this for a year and was now planning to go ahead. Shortly, thereafter, my mom slipped it to me that my sister had a tummy tuck! This infuriated me, because I thought "how dare she criticize me". I just haven't mentioned it to her again and don't plan on it. I will make up my mind on my own.
My parents were concerned when I told them, they thought it was gastriac bypass, but once I explained they were at ease. My parents had just returned from their 3rd trip to mexico and said someone had gotten ill on their trip and had to be taken to the hospital and they said they never had such good care. My parents said had they not heard that, they may have felt differently about me going there.
As for other people, I have really kept this to only a very 'select" few. Of course my partner knows, and he is supportive because he knows I have checked things out thoroughly and he has watched me countless nights on the internet researching and we have spoken about it many times before making the decision.
I don't know what the answer is with your sister, with mine, right or wrong, I have just decided to avoid the subject again with her....we will see if it comes up tomorrow night at Easter Dinner...maybe I will be posting again...but if it does come up...so will her tummy tuck that she never even told me about!
Good luck!