Despite her devoted and strong love for the sovereign, Alexandra Anastasia Lisowska - the Sultan more than once performed actions that she carefully concealed from him. Hasseki had a lot of secrets, and if Suleiman knew about everyone, he would hardly have been so blessed to her.
Suleiman's sisters more than once tried to show him the essence of his wife, but Alexandra Anastasia Lisowska always managed to "get out of the water dry." Until, then, until Fatma arrived at the palace - the sultan, who also dreamed of destroying Hasseki.
After the loss of the eldest son Mehmet, Alexandra Anastasia Lisowska ordered to build a secret room, from which she listened to everything that was said in the council room.
Only two people knew about the secret room - Sumbul - aha and Fakhriye - khatun. Both devotedly served their mistress, and probably on pain of death they would not have revealed this secret. But what does love do to people.
Syumbül - yeah fell in love with a fabric dealer Jevkher-Khatun, which was sent by Mustafa's supporters.
Having drunk the agu, Jevkher learned about the secret room of Alexandra Anastasia Lisowska and passed this information on to the mercenaries.
It was from them that Fatma - the Sultan learned the secret of Alexandra Anastasia Lisowska and found this very room, and later Fatma arranged everything so that Suleiman and everyone else in the harem learned about the secret that the beloved wife of the sovereign hides.
Suleiman caught Alexandra Anastasia Lisowska red-handed and with a pain in his heart said that he had no one left in the palace whom he could trust.
As a punishment for such a misdeed, the Sultan sent Alexandra Anastasia Lisowska into exile in Kutahya, and orders the secret room to be walled up.