Sure you can. Consider nuns and monks; its about knowing yourself. Physical intimacy is a want not a need. Discard your wants and you can better understand yourself spiritually.
Without getting into the politics of sex and religion we all know how well being celibate actually works for those nuns and monks.
During the "hot wife / cuckold" thing you have had going on was there a time that you enjoyed it and that is why you allowed it to continue?
I never enjoyed the whole not being a part of her sex life. Ever.
Why do you feel you needed to be sexually submissive and undermined by your wife?
Im not submissive to her in any way. The fact is, I have very little control (like most men) over my sex life. It only happens if she wants it to happen. Which is kinda how it is in most marriages.
Even if it was possible for her to change, your relationship dynamics to change, what would you do about the "history?"
Frankly, we all have a history. We are suppose to learn from our past and not make those mistakes in the future. So I suppose moving forward and not messing up again based on our history would be what I do.