Restrained, trapped, helpless. Lady Sara has Her slave right where She wants him strapped nice and tight into Her new chair, now it's time for some fun nipple tourture...
Well fun for Mistress.
First Mistress uses Her pinwheel roller over his sensitive nipples, loving how he winces in pain.
Now to attach the nipple clips first one then the other. Next crank the handle, pulling the chains tight and stretching the nipples, pulling them so far out.
Suffering for his Mistress, just what every slave should do.