Am I wrong to be upset about this? My mother in law wanted to watch my kids a few days ago and was talking to my husband saying she had been running to the bathroom but didn't explain what she was sick with. My husband didn't tell me they were sick either since he didn't really know what was going on. Well 2 days after they spend time with my kids my youngest (2yrs old) started puking. I thought well maybe he had eaten too much because he does do that when people watch him and feed him too much. (He likes to think his stomach is a bottomless pit and loves food as much as I do). But of course I came to the realization that was 2 days ago not yesterday so I was a little worried it was a stomach bug. Then of course my 2yr old wasn't eating and wanted tons of cuddles. Which leads me to start puking at 6am this morning and im still puking and not keeping anything down. Becoming severely dehydrated is very easy for me when it comes to stomach bugs because it goes out both ways (uncontrollably all my life). So I asked my husband if his parents had a stomach bug because I don't hardly leave the house and if it was from school my oldest would have gotten it first because he's in Kindergarten. My husband then told me his mom kept running to the bathroom before she watched them and was holding my youngest a lot that day which would explain why he was the 1st one to puke. My Mother in law likes everything to go as she plans so we figure she purposely tip toed around the fact their family was getting over a stomach bug. I have one big rule do not visit while getting over a stomach bug. I am fine if it's like a cold or something since I don't get severely affected like I do with stomach bugs. Am I wrong to be upset about this?

Nope. Not wrong at all. Sounds narcissistic and controlling on her part, especially since you mentioned she likes everything to go her way. Don't ever feel bad for wanting to keep your kids away from sick people.