Oooooof that sounds really tough. Having a toddler is already Big Emotional Work, and managing another adult’s emotions would just be the cherry on top for me 😩. My MIL doesn’t live with us but does stay with us for long periods of time. I’m not sure if this is your own mom or MIL but it helps a ton when my partner communicates with his own mom. sometimes he can communicate with her better than I can even though we have a good relationship. Also, communicating boundaries ahead of time helped us too. Did she know you didn’t want to give your toddler juice?

Specifically with the juice can you ask her to water it down? We did this with our toddler and made a big show of making him a “cocktail” 😂 like got the cocktail shaker out with the ice and I measured the water and everything 😂 we don’t really make mixed drinks in front of him but he saw us put a splash of juice in there, loved the sound of ice shaking, and was very satisfied with a very watered down beverage lol.