Is it normal to desire being forced into sucking cock by my gf?

I've been with the same woman sexually for over five years with no complaints mutually. We both serve and satisfy one another to completion without hesitating. Recently she started making me cum in her pussy on demand using her kegels. It's blissfully baffling that all my power and control is manipulated until she gets my release. Progressing further, we are now to the point where when I cum in her it has to be from behind. Why? For her to get on her knees while holding my huge load in her pussy so that she can sit on my face and feed me my cum however she does. I enjoyed the first time so much that we both require swapping my semen back to me and sharing it in a kiss.

However, since actually tasting and swallowing my own seminal ejaculate without displeasure, I want her to take it further. Quite frankly her forcing me to get mouthfucked and to swallow cum. She'll be humbling me in essence.