I am a sub and heres my two cent:... I know personally, sometimes i need to see if a Dom can TRUELY dominate me. Especially in the begining. It is my nature( too many years vanilla i guess ) to see what I can get away with. As much as I know that being submissive makes me the happiest, I need to feel that He is the one to give my submission to. I know that I am a sub that NEEDS to be broken(mmm..sometimes over and over....lol ) and never let to forget that is is HE who is in charge. Not because I want to be in charge. Just the opposite, but because I need to know He allways will be .
The consensus here is correct. Let her know without a doubt, without options, without consideration, that they way You say things are going to be... it is....
Like the famous line" So let it be written. Let it be done."
good luck Sir