Is that latecia, the real saintess, has powers that are so strong that even before her conception, she was able to affect her mother so that her mother received some of her powers. But when she came out the womb, obviously she started taking her own powers back from the vessel (the evil lady mom). And so as the powers get transferred over, the wings obedience to the evil mom will weaken over time and Leticia's hold over the wings will strengthen.
So my theory ......
Is that latecia, the real saintess, has powers that are so strong that even before her conception, she was able to affect her mother so that her mother received some of her powers. But when she came out the womb, obviously she started taking her own powers back from the vessel (the evil lady mom). And so as the powers get transferred over, the wings obedience to the evil mom will weaken over time and Leticia's hold over the wings will strengthen.