Update to my last post dealing with hammate's tumor weight gain theory and asking for responses. Original Post Surprisingly the very next day after I gave her the straight up facts and she shut me down with her headphones she tried to bring that shit up to me again. This time by saying she weighed herself and she had read the scale incorrectly the last time, she has actually not gained any weight in the last week. I shrugged. And kept doing whatever it was I was doing.  She began to discuss how once she was cleared by the doc she would start riding her bike, doing exercises, etc. I refrained from telling her no amount of bike riding would fix a bad diet and continuing to eat the sugary stuff is going to keep the pounds on. As an aside, please know that I am NOT anti cakes and donuts and shit. I believe stuff is ok in moderation. If it's part of your every day life you're going to have problems though.  Anyway, I used @Blackroses suggestion and told her I don't want to have another conversation with her about her weight, diet, or exercise. I've already said all I can say about it and the answer will never change. This is something you have to decide to do and do it. You are in control of your life. Not me, not doctors, not cakes and ice cream. It's up to you.  After this if she ever, even once, mentions something growing inside of her I am going to laugh hysterically, tell her it's probably an alien baby. Like, I'm seriously going to make it sound so outrageous that she never attempts to go there with me again. And then, any time we are around a group of friends if I get the chance I'm going to make sure everyone in the group knows hammate thinks she has an alien growing inside of her and that's why she's fat.  She will never speak to me again. And that's ok. Uncomfortable living situation but tolerable. I can live with this.