Upset!?!?

My brother takes his kids to family event even though his kids are super sick and I just don’t think it’s fair I always end up not going because I have two toddlers and I’m pregnant and well during New Years he took them and didn’t even tell us they were sick and my daughters now are sick it makes me upset if my daughters are sick I keep them home to avoid getting others sick, my mom tells me well just don’t go if they are sick I guess she sides with him even though my dad is also sensitive to getting sick since he has a heart condition and diabetes, I just don’t think it’s fair,am I overreacting!?! I mean i am very upset now dealing with a two year old that sick my poor baby