Possibly.  There is a phenomena that can occur called "mesial drift".  If
there is an empty space between teeth there is a tendency for the ones
behind it to move towards the front of the mouth. It happens most of the
time but not *always*.  Her ortho may be planning on utilizing the space
left from the extractions to reduce the overbite.  It's time for a quick
re-consultation.  She should explain her hesitance and ask if there will be
irreversible sequela from it.  Good luck.

carabelli