True, lets say that she cant have more than three powers that she can use at one time and she can only use one at a time . If she overloads then at the end of that post she will exhaust herself and go unconscious. I'm going to also pull the goody two shoes card here, she wouldn't want to hurt anyone even if they were challenging her delusions or forcing her to put her clothes back on. On top of that unless a character goes out of their way to teach her she won't have their power.

Or you could slap a bracelet on at the door and therefore limit her powers by any amount you want, the bracelet's effect would be up to you and as long as my character isn't being harassed I won't mind it.