Oops, I did mean the third law, my bad. The fourth one is enthralling, which, yes, is entirely bad.
The mechanical effects of her psychomancy would be the mental equivalent of the Reikki spell, no question. Additionally, I'd say that sustained treatment would provide justification for changing a psychological aspect around a milestone. The question was more along the lines of "does this PC get an additional Lawbreaker stunt every third appointment?" and the answer seems to be "no."
The unfortunate part of being that particular player is that she'll only rarely get to use her abilities in actual conflicts, though I look forward to her "kid at Christmas" expression when she runs into a Black Court vamp who thinks he's good at mind magic.
One nagging question I have though: if it's okay to enter another's mind with their consent, you'd think that Wizards would be better prepared to resist mental assaults. After all, you can consent to the potential consequences (a peek inside) of a mental sparring match. Or maybe the WC just doesn't encourage that sort of thing because they are professionally hidebound.