Why use the binding rules? Use something like Geas instead to make her "stuck" in place and unable to plan an escape without becoming weakened. None of the blantently obvious tools of the trade for binding required. Having it cast by a much higher level caster means she would have trouble finding someone to remove it etc.
Have it be punishment for trying to take advantage of said caster, so she is stuck in that location, unable to think about leaving or being humbled without the spell kicking in. Sure she could leave or scheme but every day she does she takes a -3 to every stat (up to -12) which would leave her very vulnerable (Str 13, Dex 17, Wis 14). This could give you some leeway on character interaction that you are looking for.
Young woman basically cursed to be stuck there? What hero would not want to help?