There was a scene close to the end of the first episode where the campus colony was destroyed (crumbling walls, buildings) and all of the the inhabitants were dead (or walkers) on the ground and they were going through finishing them off. And the evil lady received a report that the girls were nowhere to be found, and she said, 'Good.'. That was what made me think that she had planned on destroying the colony all along, and wanted the girls out before she did so.