This is 1/2 confession and 1/2 looking for advice.

Married male here - recently my wife agreed to let me watch her have sex with another guy.
(long story as to why we even considered it...too much to write here)
She has only been with 2 guys total in the past 2 years, so its certainly not a "lifestyle" for
us or anything.
Both guys were black and well hung, it was a treat for my wife as well as for me to see her
that content. We were not looking for black guys specifically, it just kind of fell into place
with them.
Honestly, that fulfilled every last fantasy I ever had.
She sucked both our cocks at the same time, we "took turns" with her, there was alot of dirty
talk about how big his cock was.
And yes, after they left I would go down on her. I could not help it, I was drawn to her
sloppy pussy! My wife and I shared another mans cum....how special of a bond is THAT??
My confession is that I ate another guys cum out of my wife (twice) and it was very exciting
and erotic.

Now the problem...
My wife and I had the best sex life planning and talking about the "what ifs" of her having
sex with another man. And everything worked out perfectly.
But now that we did it...now what??
We can't talk about the "what ifs" since its already been done.
We both fulfilled every fantasy we ever had.
For the past couple months we have talked about what DID happen to get us excited,
but that's getting old.

We said after the last time with the 2nd guy that we would not do it anymore.
But we both seem to not care about being intimate anymore with each other. We don't have
that added "spark" that another guy gave us.

I never considered the letdown after you have done everything sexual you ever fantasized
about.
For my wife and I...now what??