Board Thread:Speculation House/@comment-4830106-20131108040231/@comment-11188061-20140228010206

"Weiss' mother died when she was in her late teens and had previously helped her singing (which is the only thing she ever really wanted to do). After her death, Weiss' father became distant."

I always try to avoid assumptions like this simply because you don't know if it's true. But it is almost confirmed that the dominant parent figure behind Weiss was her father.