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The original was posted on /r/amitheasshole by /u/Remarkable-Care-2619 on 2024-01-18 21:59:07+00:00.
1, 26F, just got married to the love of my life, 32M, in december. He proposed in summer 2022 but we decided to hold off on the wedding due to some personal reasons. I have never gotten along with my SIL, 25F, she is always trying to put me down and is overall not the kindest. I met my husband through her when I was 20 and she's been kind of distant since then. While her and I were friends I shared a lot about my insecurities. I used to be 300 pounds and was very insecure about it. I went on a weight loss journey but she always felt the need to compete with me but she wasn't able to lose the weight. If I worked out for an hour she had worked out for 2 or, if I chose something healthy on the menu she would laugh at me. Despite us drifting this hasn't really gone away. I have lost some weight and am at a healthy weight now. It's important to note I only lost weight for health reasons and not appearance reasons, despite this, I think losing weight has made men more attracted to me(not that this is important). I am now thinner than her, she is chubby but not fat like I was.
Of course she was at my wedding, she was a bridesmaid and her and I were actually getting along well and there were few issues. She was actually super supportive during the whole process. The ceremony was gorgeous and I wouldn't hesitate to call it the best day of my life. During the reception the cake came out and everyone was having it and I noticed that she wasn't. I could see her eyeing me as I ate cake. I had 2 slices and by the time I was on my second slice I could feel her eyes. I felt like she was judging me for eating cake after my weight loss. I think she is jealous because I was able to lose weight and she wasn't. I was tipsy and decided to confront her. I asked her what her problem was and why she isn't eating the cake. She seemed offended but didn't say anything. This upset me more and I lost it, I told her she thinks she's a good person when she's really not. I also accused her of being in love with my husband. She left in tears and the rest of the night was tainted from the interaction. My maid of honor texted me and told me I way overreacted and some other guests shared her sentiment. I haven't apologized but have been thinking about it since my MIL cut off me and my husband. My husband agrees she's probably in love with him and I should just leave it alone. AITA?
EDIT: I want to give more context on our friendship. When I was bigger than her she would make remarks about me being the cow of the friend group. When I started my weight loss she made fun of me for it. Now that I am thinner than her I think she’s jealous that I’m able to eat cake now.