HI, What part of NO does she not know. You are the Mom, and the word of mom means boss is my house. You can give an answer more in depth than NO,but she knows why. No further explanations are needed at this time. Period. Advice from a 70 year old mother of 44 yr.old beautiful,sweet,lady, with an 18 1/2 yr. old girl, that says "Thanks Mom, for loving me enough to say NO when needed." Hang in there it does get easier as time goes by. OXOXOX glo