okay the queen give confirmation that crown prince and blondy can marry. but that's still no confirmation if they can become king and queen. since current queen is still head of family, she can re-enacted who become successor and become king.
and also "the end" have ties with queen family maybe there is some hidden rule if noble come to that village can change the structure of kingdom because the noble waking-up some beast/wizard.
since queen give pin-point in chapter 6 that can make blizzard is just the queen, so maybe since "the end" awake, she have no control of the blizzard. and maybe since the title is obey me the FMC will get the power/control of "the end" and ruller of kingdom change.