>>41517355>The only ring involved should be the collar around her neck, chaining her under your desk as you rule the country in her stead.There are, in fact, magic items for this.
SLAVE COLLAR
Aura moderate divination; Cl9th
Slot neck; Price 25,000 gp; Weight 1 lb.
DESCRIPTION
Slave collars are popular items among drow, duergar, and
oth er Darklands societies that require obedience and
servitude from slave castes. As th ese collars are relatively
costly, th ey are typically reserved for use on particularly
powerful or desirable slaves. A slave collar consists of a
simple ring of metal (typically brass or bronze) that latch es in
place with a lock. Many feature additional adornments like
short lengths of chain. Each slave collar's lock is attuned to
a unique key. Th e person who carries a collar's key is aware
of that collar's wearer as if it were th e target of a constant
status spell. In addition, th e key carrier can communicate
telepathically with th e wearer of th e collar as long as th e
wearer is within 100 feet of h er. As long as a slave collar is
worn, that collar's key carrier automatically penetrates th e
collar wearer's spell resistance (if any), and th e collared
creature takes a -5 penalty on all saving throws against th e
key carrier's spells. A slave collar's lock can be picked with
a successful DC 40 Disable Device ch eck, or broken open
with a successful DC 30 Strength ch eck-eith er method
immediately destroys th e slave collar. Th e wearer of a slave
collar takes a -10 penalty on Disable Device or Strength
ch ecks made to disable th e slave collar it wears.
CONSTRUCTION
Requirements Craft Wondrous Item, status, telepathic bond;
Cost 12,500 gp
Or, if you'd rather something that gives you a bit more control:
http://www.d20pfsrd.com/magic-items/artifacts/minor-artifacts/crown-of-the-ironIt's an artifact, though, so GM fiat on whether you can get one.
