So my mom never developed good eating habits, and I think because of her, I’ve made a big effort in my life to learn to cook and eat healthy. I’m also a SAHM and very much enjoy meal prepping and planning, her meals were always roast beef, chicken, potatoes, corn and/or peas growing up, or stuff from a box/freezer. We barely touch that stuff if I don’t need to(the stuff from a box or freezer, we obviously eat beef and chicken) . She is overweight and because she lies so much, we can’t believe her on anything she tells us. She’ll tell me she’s been doing great on her diet, and then tell me she’s diabetic, and then tell me she’s been cured all in the same day depending on her motives at the time. She’s recently injured herself partially because of her bad health habits and has come to stay with me for a few weeks since she can’t do much on her own. All the cupboards have child locks on that she can’t figure out (as I have 3 kids). Our meals are mostly healthy here. I’m refusing to give her certain things, not ordering take out, not giving her pop, not buying her sugar crap that has no other nutritional value(example donut) , forcing her to eat multigrain bread instead of white, etc. Her calorie count is way down since she’s been sneaking McDonald’s and other fast food for years all well telling us all the time how great she’s doing on her diet, but now she can’t sneak food. I’ve never really pushed her diet, it was mostly my sibling as they live with her full time and I had no patience to deal with her lying about it. Am I an asshole to cut her calories so drastically? She’s probably gone from eating 2,500 a day(guesstimate from the stuff we find out that she’s hidden) to maybe 1200. (She’s 4’10). I feel bad it’s so extreme but I know if I give her an inch, she’ll take a mile. She’s eating what I’m eating, however I’ll take a pop or handful of candy sometimes when she’s not around. I’m also breastfeeding twins and 110lbs and need the calories. She has access to apples that she brought with her. 

Further info - her dog also just passed away so she’s even more inclined to emotionally eat. But my older son is keeping her super busy instead of moping so I’d like to think that’s a moot point given she has something to focus on. But maybe relevant because I feel guilty I’m doing this at a very sensitive time for her. 