The dragon-killing curse that I had Legion carved into the stone floor before covering it all up with the red velvet carpet will run out of magical power eventually.
But long before that can happen, I am sure Monalisa would be nothing more than a corpse even if the curse is not as effective against her as it would be to an actual dragon.
The curse is designed to kill a real dragon, and Monalisa is not a real dragon. She cannot even be stated to be a partial dragon or a dragon hybrid either even if she has dragon blood flowing through her veins in some capacity.
That is because Monalisa cannot transform into a dragon or take on any physical strait a dragon might have. She can, however, use dragon magic amongst other things with some extensive trainings. Sadly, there is no one to teach her about those things, as dragons do not teach humans how to make use of their power.