Razor,

You can work on either version.
The story is wonderful, compelling and gripping.
It's the telling of it that needs just a bit more work.

Both Dean and Nikita have raised some excellent points.

Here's a few more suggestions, that may contradict with the others.

1. Don't use a ";" - semicolon - for a period or comma.
Use the appropriate one.

2. You can save many words, keep up the pacing and help this story by removing the "It was" passive tense.

3. I agree with Nikita. By defining the word that you have used in the title,
you are using valuable words that can be used elsewhere.

4. The transition that defines the word, cuts the pacing and
jars the reader. I'd like to see this done without that transition.
Use something that will tell us what's going on now, versus then,
but that won't need 4 blank lines in such a short story.

If I were to only edit what you have here, this is what I would do to it.
Not writing, just editing:

Fugue State (Version 4) - editing sample

I sucked gleefully on Michael's cock as he rammed it to the back of my throat. His hands guided my head along his length. Michelle pierced my cunt with a strap-on and grasped my wrists. She kept me on my knees, exposed to their assaults.

As the duo ravished me, a sense of dread overcame me. Had I forgotten something of life-or-death importance? Within moments the feeling dissipated. Once again, I succumbed to the pleasure.

The couple handled me like a filthy piece of meat. I loved them for it. Licking the penetrating cock, I thrust my hips in rhythm, feeling more satisfied and full than ever before.

Michael's cock erupted in my mouth. That feeling returned. Yet this time, it blossomed. At that moment, I realized my tragedy.

Memories of my husband and children returned, along with memories of my spontaneous desertion.

I let loose a muffled scream. My lovers loosened their grip. I crumbled onto the bed and Mike's cum blasted across my face.

Crying in a pool of cum, I accepted my horrible mistake.
From here you can either fill in more juicy details in the middle, or
elaborate on the mistake. I believe the ending is stronger,
if left at the last line.

I accepted my horrible mistake.
That's powerful and thought provoking.

I don't need to know her name or her title.
I don't care if the couple are married or not.
I care about what's going on and why it's a mistake.

Hang in there.

You've proved you can write, now it's time to take it one more step farther.

Think about how you presented the story.
How you can mix up the sentence form and structure to make it stronger?
What details are important and what feeling do you want to leave the reader with?

To your success!

Ruby