My 6 year old son is in kindergarten, and he is going on a field trip today to a theater to see a play. My mother in law ( who lives with us ) is making me feel bad because I didn't go with him. I really didn't feel like I needed to go, because I believe he's perfectly fine in the school's care. MIL thinks I should have gone and is making me feel very guilty about it. What's your opinion about this? Am I wrong for not going??