Barton you could try raising more than one topic at a time. Therefore you will have discussed a number of options and for your next scene she will not know exactly which one you intend to do, so you will still maintain the surprise element and more importantly yo uwill still maintain control.

Many subs will try and top from the bottom, when given the chance, and some don't even realise they are doing it. I have no real information in your case so I can't really comment any further. But once you have discussed a new activity with your sub does not mean that it must be tried at the very next session. Keep her guessing and anticipating what is coming and I am sure both your and her delight will increase.

As to specific ideas, I am not sure exactly what you are after and also what level you are both willing to go to. Does she enjoy the pain or simply the submissiveness?

Whatever level you are at forced or withheld orgasms are always an exciting one - especially if you have not done them before.

Jason