Tell her what I did.

With my cock in her mouth I began to tell my wife everything that had happened with me and Gina.
She kept sucking my cock as I described the feeling of being with another woman, and looked me in the eyes as she knelt between my legs.
I paused in my story and reached down to feel her pussy. It was even wetter than before; clearly she loved the thought of me with other women. I slid my fingers in her and thrust them in and out a few times before withdrawing them, covered in her juice. I was about to lick them clean when she surprised me by taking my fingers in her mouth and licking them herself. She'd never done that before!
"Do you taste good, baby?" I asked as she went straight back to swallowing as much of my dick as she could manage.
"MmmmHmmm" she moaned into my cock, the vibration feeling incredible.
"Bring your pussy over here, baby," I instructed her before I continued my recollection.
I began fingering her, sliding two fingers into her and spreading her open as she continued licking and sucking my cock.
Her pussy was incredibly loose and I put two fingers from my other hand into her as well, spreading her pussy further open so I could have a good view of her, as her sugary juices began dripping onto my tongue.

"I'm going to have to fuck Gina many more times, you know," I finally said as I finished my story and buried my tongue back into my wife. Immediately she trembled and came. Whether it was from my tongue, or the statement, or a combination of the two I didn't care, and just licked up her juices flooding my mouth.