For some alone time with her

"Well..." she asks you, pulling you close enough that only the two of you can hear the conversation, "what WERE you going to ask me, John?"

"I was just wondering if I could get some alone time with you Gwen," you tell her, rubbing her arm and hearing her moan softly as you continued to sensually rub it.

"Come here," she motioned to you, pointing her fiance out to you, "that's my man over there and I do love him more than anything in the world. But I'm more than willing to have one more wild night with you...if you're lucky enough to get that far with me."

It wasn't EXACTLY what you were wanting to hear, but it was a start, so as Gwen ran off to give her man a bullshit excuse to cover for her bailing on him, you plotted where to begin things with her.

And how to get to the point where they would end with your cum in her pussy.

"So John," she says to you as she comes back up to you, "where would you like to take me first?"