I would just tell her that since she didn't respond earlier to you, that you already made plans after trick or treating. You should definitely go trick-or-treating with them because you are buying the costumes. They wouldn't be going anywhere if it wasn't for you.
Afterwards, kiss your kids goodbye and go your own merry way. I can't believe how much your W treats your kids like property.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.