I had seen my MIL do something once before many years ago. Thought that it was a one time thing, and being newly married, did not open my mouth. These are the things my MIL has been doing (not all on one day, but the last item made me want to scream and hence this post) 1) She took rice from her plate and put it back in the dish. If this was rice that was put on round one, I might be ok. But she had finished eating sambar rice, and when she put rice for curd, it was too much for her, so she coolly used her right hand and put the extra back in the rice cooker! 2) After eating anything on the table - breakfast of bread, evening biscuits/snacks - if any crumbs are left on the table she just throws it on the ground 3) She uses her hand to clean the sides of all the containers (the inside of the container - sambar, curry, curd etc). Maybe this is also ok, and I just don't like it because its something that my mother never did. So this I totally ignore, but due to this I rush to clear the table and keep everything in the fridge. 4) This was kind of a repeat of #1. Two days ago she put rice for herself. Again this happened after the sambar rice was over and she was taking rice for curd. Using her right hand, she scraped the rice from the spoon and put it in her plate. I know she knows that it is not something that is done, because she did it when she thought nobody was looking (I was talking to FIL and son was finished with food). 5) This is the one that has me wanting to puke and thinking whether anything I eat now is clean or not. Sunday night she sat for dinner. She took some curd and made it into buttermilk for herself. She drank straight out of that container, and what was left over she poured back into the main curd dabba. I was aghast and disgusted. DS had not yet had curd and when he said he did not want any, I did not force it on him. Luckily none of us were home yesterday for food, so they finished that curd themselves. I had already kept some curd aside to make a new batch. And this time what I did was make it in small dabbas that would get used in one meal, so that I did not have to even fear whether or not she had done the same thing again. I don't point these things out to her since it will become a full blown mega-serial with tears and fainting and claims of being sick for the next few days. But since that last instance, I am quite upset.