There is no ickiness if she's clean. I've eaten lots of womans assholes, and I sure would let a nice trannie sit on my face with her balls resting on my nose as I kissed,licked and probed her pert little boi pussy.
Accept that fact that you're a natural cuckold then embrace the lifestyle. It seems most guys feel conflicted after they cum. My answer is to not cum until later.
Here's something my wife does to me after shes done fucking her bull and I'm dripping cum with my sissy nuts blue and sore she'll put numbing cream on my cock head,then two rubbers on my dicklet and let me fuck her giving me five minutes to cum.
You're so right,after all it's part of a cucks duty to suck the bulls big cock to show appreciation to him for fucking our wives then make us open our mouths showing our wives the bulls cum before we swallow it.