Checked when I got home and he definitely locked me out and changed the password so I can't undo it. Plus you can only redesignate an Xbox twice a year, and I believe we already did it once so whatever he did is likely perminant.
M:26 H:32 T:8yrs ILYBNILWY/ "I'm not happy": 2/6/16 D-Day-discovered PA/EA: 2/10/16 Separated: 2/14/16 He's living with OW I moved to different state: 06/16 Currently: Trying to move forward