Sandra hops her plaything, Crystal, into the room. Crystal Sandra is in proper domme attire. The ropes weren't there to punish. Sandra pushes Crystal to her knees and moves her onto an ottoman for display purposes. She leaves Crystal to struggle for a bit as she retrieves a final length of rope to pull Crystal in to a tight hogtie.
The ropes are simply there for restraint, not to punish. She intends to let crystal lose herself in increasing levels of ecstasy