What did Sultana do with Ali's pornography stash? Why did she do this?

When Ali wrangled an invitation to go on the trip as well, Sultana became enraged. Sultana took Ali's new headdress and flushed it down the toilet, causing Ali to break his toe in his attempt to stop her. Afterward, Sultana became afraid of what her father would do to her when he learned what happened. In order to distract their father, Sultana took a stash of pornography Ali hid in his room and brought it to the mosque. The pornography included a group of slides that had Ali's name written all over them.