T-maybe it is. Let me tell you a quick story. When i was young I weighed 98 pounds. I looked good. Remember I am short so that is a good weight for me. After S, over time, I gained weight to 128 pounds. Everyone else still thought I looked good but I didn't. I was not huge, the girls who have seen me on the alt will say so (MT, Hope, BG). But I felt like the Pillsbury Doughboy. FAT FAT FAT!!!!!!
Last year, with bomb, me, getting sick, I started to lose weight. I am now 92 pounds. I FINALLY feel like I look good again. I finally don't feel like a big blob walking down the street. I do NOT want to put the weight back on. H and another mele friend think I look good but keep telling me that I could put some of the weight back on and would be ok. What they don't understand is that I wasn't ok that way. I don't want to hear that from them. I simply want them to support me as I am and not give me greif about eating.
You don't have to love what she wants but it sounds like she wants your support and approval to an extent. Don't worry about the $ don't even bring that into it. Let her worry about it. She may never have the surgery because of that alone. I would word disagreement as something like "it isn't something i would choose for myself but if it is something you want, even though I don't think it is necessary then I am behind you and I understand." Don't make everything a battle T. It just isn't necessary.
One other quick thought, I cut my hair a few months ago, to much opposition from some. I wanted it cut. Which comments meant the most to me afterward, not the one from H who said it looks choppy, but the one from another who said I liked it long, but it looks good. I do secretly agree with everyone, i miss it long but I needed the change and am now letting it grow again. Just a thought.