since you already stated that you arent allowed to cum anyway, into selfbondage and experienced with edging lets try 2 of my personal favorites...
the easy one is feather edging. tying your legs spread apart as far as you can without pain. goal is that your pussy is spread far enough to expose your clit. Pillows under your ass to raise your hips and make them more immobile.
then put on a collar and tie your nipple rings to the collar so there is a constant pull on your nipples when you lay back.
you may get any visual stimulation (porn) you like going and give yourself 2 edges to get the juices flowing...
then you grab either a feather or a similarly soft brush... and all you are allowed to touch is the feather/brush with your clit. you may speed up and slow down but you may NOT stop.
do this either for 30 minutes, OR until you are ready to cry from frustration... witchever comes first
second one is similar but not the same... the "dangling vibrator" needs a few facts of witch im not sure... 1. you need a lamp or a hook or something similar in the ceiling over your bed (or wherever you get tied up.
again with legs spread, but no pillows under your ass.. you are supposed to be able to move your hips...
then you hang a vibrator with cable (batterie ones would give out too fast) from the ceiling so they rest SOFTLY and BARELY against your pussy, with no pressure.
nipples also get tied to the ceiling hook in that case
hands tied over your head.
NO clock in view.
with the vibrator freely hanging it will move away each time you trust your hips..
and even while it rests on you, with no pressure ive been told cumming is almost impossible.
as for how long? well once you think 30 minutes are over you may untie yourself.. but if it was less then 30 minutes, you have to retie yourself.. for a min. of 40 minutes this time.. expanding by 10 minutes each time you get free too early.
looking forward to drive you MAD with desire
and looking forward to the report