Have NC'd for this. So SIL's DD has broken out in chickenpox. We had planned a family day on Christmas Eve to a soft play area for a santa themed event. I mentioned to SIL that I assumed DN would no longer be going as she has chickenpox and SIL has said it's fine as other kids will need to get it at some point and has asked for us to keep it quiet in case the other parents are annoyed. I am pretty shocked at how casual she is about it and think it's not on to risk the other kids just before Christmas. AIBU to think she shouldn't take DN?