She thought she could spot anyone wishing her harm, that she could easily identify him by appearance and mannerism. It's more comforting to presume evil people are obviously different and that you can identify them as soon as you meet. You don't assume a normal-looking, charming, and handsome individual could want to harm you. Sandy never dreamed a new client could be a wolf in sheep's clothing.
Alma is always eager to please her Mistress. So it is when she is introduced to her newest responsibility, a visiting dominant who requires immediate attention.
Imagine a scientist who has created a drug that controls people completely, then imagine that he sells it to anyone? What could happen next. Please note this isn't a nice story. My apologies for Glockenspiel's accent!