You should feel bad or selfish, any of us here would struggle with that situation! Although yes what she is going through is terrible and I feel a lot of compassion for her and hope the side effects don't cause her much more anguish the next time she has treatment, it would freak me out too. Honestly, my face dropped when I read the part about the sink and I don't even think that's because I have Emetophobia, I would think MOST people regardless of this phobia, would find that a little strange or uncommon perhaps. Therefore I would think that it is an approachable topic to consider asking if maybe there is another way around it? Or asking your husband if he could politely say it is making you and he uncomfortable? Of course you won't catch anything as it's from the chemo but nonetheless the sound and knowledge that your plate is being washed in the same sink is highly traumatic for you. You must feel so trapped and scared and the fact that you think you are being selfish proves that you aren't! If you were being truly selfish you wouldn't have thought you were being selfish in the first place. If that makes sense. Other than politely letting someone know it's making you uncomfortable and causing you anxiety I really don't know what else you could do. It's definitely a tricky situation and you may have to keep quiet about it as it is your mother in law. Overall I just hope you hang in there and it passes quickly and you don't have to worry too much x