I would recommend strengthening your trusting intimate relationship before approaching anything else
Thank you for pointing that out, and for the rest of your observations. They really do help to guide my thinking.
To the poster who mentioned that there are a myriad of other ways to exercise BDSM, you are right and I am not in any way wedded to spanking, it's not a must for me at all because to me it's more about power exchange. Thanks for pointing me towards the book. I'll try to find it and read, very helpful.
StateOfMind, thanks - yes I suspect that is much more likely of a scenario in our busy family life. I don't desire a 24/7 and I don't desire to make ALL decisions on her behalf. Realistically that's not possible. What I do want and yearn for is 1) more harmony and less butting heads over every decision, and 2) more control indeed, more order and discipline. I want her to stick to the promises she makes for herself, and to me and not change on an impulse. I don't have to decide everything, we can split the decisions. But if we both agree to a goal in the family, and if I have responsibility for it or see behavior that is not in line with it, then I should have the final say on it. There are areas in which she is better at, such as engaging children in playful learning, or decorating the home and I'm happy to take her lead there. The most important is to avoid constant clashes and to bring more harmony. I also feel that she doesn't fully trust me - it's not just me, it's anyone. She has a hard time letting go and trusting. To me that's hurtful when I have the best interest of everyone in mind. It does not mean that she should not challenge me, as I am not perfect, but it does mean she can just accept something for the moment simply because it's my will and then explain later her disagreement or her point of view. If I love her - and I do love her dearly; I look at here every day and think oh how lucky I am! - then I will be disappointed in myself for not having made the decision that made her happy as well. I will take that feedback on board and try my best next time to do better.
I initially said that maybe submission in the bedroom leads to submission outside, but I see now that I may not even need that. I need harmony outside, and perhaps submission in the bedroom is more than enough. I don't really know and we don't know how she will evolve either. At the end of the day, I need to take it one step at a time. At this moment I think the intimacy that comes with BDSM in the bedroom can only improve the rest of the relationship.
To the person who thinks allowing another to make decisions for you is soul destroying: I beg to disagree, as I went along with her decisions in the past and I am not a destroyed soul. I think it's a matter of balance and degree - depending on each of our's need for independence or dependence. The fact that you pass such judgement on me from one statement is quite hurtful- why should she leave me, if I don't force, I don't badger, nag, abuse, pout, manipulate, and only wish for a better relationship for us? I'll approach her openly about changing deliberately the balance of power in our relationship, with the hope that she will like it, settle in with it and that we both find a new dynamic that is more harmonious and suits us better. And if it doesn't, it doesn't- I'm flexible and can learn to live with a lot less, as I have until now. To want a bit more control and ask for it openly is not criminal, is it?!