My 2 daughters aged 17 and 13 stayed with my in laws for the weekend for me and husband to go away. On my way home, I found out that, on my husbands say so, my in laws let our 2 girls stay in our house overnight, with no adult present. I am absolutely livid that this decision was made without my knowledge and have argued with husband and in laws. I feel totally undermined. Am I over reacting, as they all seem to think I am?!