So long as terms like subordinate, submissive, and slave, can exist on a continuum of level of service... and that the boundary where subordinate becomes submissive and the boundary where submissive becomes slave, can be flexible... and unique to each couple...

...then I agree denuseri.

jeanne, I suspect, will never be a slave per se, but may well practice submission at a level that in indistinguishable to some from slave.