This is clip 2 (of 2) from "Dungeon Weekend for Secretary Lorelei". Lorelei has been re-bound into a frogtie. All she's wearing now is her silky underslip, hose, heels.... and a tape-gag. It looks like preparations are being made because there's a chair nearby with a vibrator tied to it. Next we see that Lorelei has been secured to the dungeon chair. Her captor stops by to grope her and expose those ample breasts, then switches on the vibrator and leaves her by herself. Lorelei squirms around the seat trying to get away from the vibrator, but it just isn't possible, so eventually she gives in and orgasms.