Admittedly I'm jealous that she seems to be putting very little effort in and seems to be doing well. I am not undermining my own progress, I've lost 120 pounds so far, and 90 alone from surgery. I have completely overhauled my diet and life. But I am still jealous of her ability to eat whatever and still lose weight.
You are working hard and seem to being doing things the right way for long term success...You've lost over 100 lbs and that speaks volume. Please don't feel jealous of her but feel sorry for her because like the other posters said, her weight will come back unfortunately and guess what...those same people trying to get you to eat junk will be talking bad about her and saying that she should have been like you and turned down the junk food. yada, yada, yada...It's her life though.
I know people as well who's had wls and did the same thing, never changed their eating habits or lifestyle and the weight has returned.
Keep doing you, we are proud of you and here to support you.
PS: You may want to distance yourself from her so as to not pick up her bad habits, be around positive people that are going to motivate and encourage you. 😉