Decisions, Decisons...
Andrea was reasonably certain of her choices regarding her future, though various probability forecasts has already come up with several things that could go catastrophically wrong.  The probability on those, fortunately, was rather low.  Success seemed far more likely.

She had already spoken to her father on the matter.  He, of course, had agreed to support her in whatever choice she made.  Comforting, though largely unhelpful.  But she ultimately did not wish to overly burden him.  He already felt badly enough for not being able to help her in the time she had become human and it had taken a great deal of convincing to keep him from coming to rip Vincent limb from limb.

Therefore, she needed another opinion in the matter.  Kristoff or Cassandra would do nicely, and thus she went to seek one of them out.