So today at church I found one of the nursery teachers giving my son's teething toy to another baby…

So today at church I found one of the nursery teachers giving my son's teething toy to another baby I was pretty livid because in my mind my son could be taking in another babies germs what if the baby sick? And gets my son sick and she didn't clean it she just stuck it back in my son's carrier am I wrong to be upset :/