I think what you are failing to realize is that your sister in law has ALWAYS been intimidated with you and has low self esteem issues that she needs to deal with. What a lot of people don't know is that everyone who is skinny doesn't feel pretty and unfortunately sometimes they aren't, but beauty is in the eye of the beholder. Beauty also comes from the inside out, which she seems to lack in that area. I myself have felt pretty and confident even while being "fat" - maybe not as pretty, but that can be expected. You and your mother are not going to be able to change the way she feels with all of your kindness because she is the way she is and until she becomes a happier person on the inside it will continue to reflect on the outside. That is something only she can change. Who in the world would even be jealous of their husband's "sister" anyway? That sounds plum crazy, however, maybe she is LOL.................but that's not your problem to worry with. All you can do is pray for her honey, live your life, enjoy your progress and keep a smile on your face because what was going wrong for you in your life and bringing you down (your weight) you are changing that for yourself. Now she needs to deal with whatever issues she has going on and fix them because it has to stem a whole lot deeper than being about JUST YOU that's for sure. She doesn't even have enough confidence to ask questions about "you" to you. So while you haven't gained your self confidence back yet.........let's start working on that right now today because you are doing GREAT and it is showing AND this isn't even "your best" yet. Don't be intimidated by her or anyone else because I'll bet that she won't be the only "hater" that you gain by getting your smaller self back :-)