Also her family upbringing has twisted her sense of what things are harmful vs pleasurable…though only to a point.
Weds has a fascination with death, but we see she does not want people close to her to die. She delights in some level of torture, but does differentiate between “fun torture” and “punishment torture”.
Probably the most disturbing thing about weds is her clear lack of moral boundaries in pursuit of her goal. She is willing to maim, even kill others to protect her brother from bullying. She is willing to torture Tyler to get at the truth. Yet she is not a psychopath that has zero empathy, it maybe blunted but we can tell she does care about others in her own twisted way. So she at some level understands what she is doing to people…but still does it anyway.