Hi FreyasMaster, nice to meet you :-)
i've just read this post and the comments several times to try and make a bit of sense of it. i think perhaps the main problem i have getting your dilemma through my brain (maybe its just a 'blonde' day) is that i have always thought that the differences between 'submissive' and 'slave' are quite defined, to me they are not interchangeable terms of reference, they are very definite roles with very definite differences. i don't know what others think of the whole 'slave' vs 'sub' debate so maybe it would be good to share views on the subject....
However, i agree with babs wholeheartedly. A slave is without limits, and without objections, fully and completely submissive, merely there for the pleasure of their Master (within the boundries of SCC) so therefore when you say "In a nutshell, 50% of the time full unconditional slave, 50% not, and the when one or the other is on is very mixed, so really what needs to happen is during the agreed upon times when she is fully 100% slave, she needs to be that unconditionally. That needs to just happen. Need to have that talk (with paddle in hand)." i just wonder whether you and your wife are indeed 'singing from the same hymn sheet' as to what your expectations are, of each other. Maybe there is a little confusion stemming from the fact that an open, frank and honest discussion needs to be had.
Good luck,
kk
A few suggestions. Up until recently I shared your wive's position for the same reason, but Master wanted it so much my desire to please him helped me make changes.
The first step is to clear up the roids. There are many ways to do this if they are indeed small, frequent hot soaks in the tub, medications, diet (activia yogurt and daily salads were greatly helpful for me). Next is a trust issue. I revised my hard limit and began to allow Master to rub his cock between my cheeks. I trusted him not to go beyond that, and he enjoyed the sensations and visual it gave him, and appreciated my efforts to please him.
At the same time we purchased a small, thin butt plug. Once the roids were under control, not prominent or visable, and bm's were no longer painful and/or bloody, we began the process of stretching my anal opening with the butt plug.
Remember to stimulate her clit while using the plug, even fucking her vaginally while it's in and allowing her to come. This will help her associate anal penetration with a pleasuable experience. I love the full feeling of double penetration, it can be highly erotic.
Successful? Yes, as a matter of fact Master had anal with me on Sunday night, giving it a good hard pounding. It still does very little for me, but pleasing him, being used by him for his pleasure is highly erotic.
Yesterday I continued my anal training by inserting a medium sized plug in myself and wearing it for an hour. I used my g-spot vibe and mini-wand vibe and ended upcumming 3 times in less than five minutes. The only time I experienced any pain was during the insertion and removal of the plug. I am hopeful that this will gradually disappear the more stretching I do.
I hope this helps your wife, after all providing you with pleasure should be one of her most important goals. Oh by the way I had 3 kids in 4 years and have had roids since my first pregnancy 16 years ago.
Also you might try pussycat's idea of both creating a bdsm list, what you want to try, what you definitely like/want, and what you are hesitant about, then try bartering with her. Try something from her list you prefer not to do if she is willing to try anal for you. Good luck.