This affects almost every aspect of education, and has MANY different effects.

No one said that Rainer was not her father. However, I do not think it was ever said that the hand mark came from her father, but from the Wanderer (Rainer).

I think it was inferred. When Bo touched Rainer, the spot she touched glowed, like it does when she uses her seduction. Rainer then touched her, and where he touched glowed the same way.

In cased you missed it, Bo tried her seduction powers on Rainer and he turned them back on her, thus the reason she is so infatuated with him.