You fuck her from behind

"MMM...I can think of a few ways, too John," she purrs in your ear as she manages to finally get your pants off, you having already slid hers off, and her panties, as well.

You knew as well as things were going with Kelly that there would be time for foreplay later, but if what you and her both wanted was a hard, nasty, drunk fuck in the bathroom (which you're pretty sure it was), that's what you had just decided you were going to give her.

"Wait...I can't...I'm married...FUCK...YES..." Kelly moaned as you grabbed her hips and slid your dick into her pussy, her walls starting to wrap around it as she started to subconsciously slam her ass into it, despite her brain working to remind her that she was in fact a married woman now.

"Just go with it Kelly," you whisper to her as you lift her shirt up over her head and start to play with her tits, "you know we both want this, baby."

"OHGOD...YES...just...don't...cum...in...me..." she moans as she throws her head back and goes limp, shuddering from head to toe as she cums all over your dick, white-knuckling the toilet she was bent over as she shot her cream out on your cock.

As her pussy started to pull and tug on your dick, you figure that if she's let it go this far, she probably won't care all that much if you did cum in her.