Fahsai,
Please by all means reward her for her cooperation with the brace by giving her this one important night off! One night off in the scheme of things is nothing. I am quite sure her orthopedist would say that was fine if you asked, also. I think this type of small concession/reward goes a long way to pave the way for continued acceptance of the brace. She will have lots of fun and get to forget about her scoliosis for one night, which is really important.
Gayle, age 50
Oct 2010 fusion T8-sacrum w/ pelvic fixation
Feb 2012 lumbar revision for broken rods @ L2-3-4
Sept 2015 major lumbar A/P revision for broken rods @ L5-S1
mom of Leah, 15 y/o, Diagnosed '08 with 26* T JIS (age 6)
2010 VBS Dr Luhmann Shriners St Louis
2017 curves stable/skeletely mature
also mom of Torrey, 12 y/o son, 16* T, stable