On her tits

You deliver your last few strokes to her throat before sliding your cock out for the last time. Her face is a mess from all that rough throat fucking with her mascara running down her face and her lipstick smeared.

When you pull your cock from her throat and start stroking it with your hand, Diane knows exactly what's coming next, she is an experienced woman after all.

"Where would you like to cum on me big boy?" She says with a raspy voice from all that throat fucking.

"I'm gonna cum all over your fat tits. Hold them up for me."

Diane does exactly as instructed, another trait which seems to run in the family. She uses both of her hands to squish her breasts up for you, almost making a nice flat surface for you to deposit your seed onto. Within moments your cum shoots from the tip of your cock, creating great streaks of white across her beatiful breasts, a canvas for your artwork.

Releasing a big load all over her chest, you let out a final groan as you shoot your last spurt of cum onto your girlfriend's mother. Seeing that you're done, Diane licks at the tip, cleaning off that last drop of cum still sticking to the end of your cock. She licks all around too, ensuring your cock is spotless after the filthy acts the two of you just performed together. Eventually she stops, and you walk over to your chair and slump down to get some much needed rest. Diane simply sits back and rests her head against the wall of your office, leaving your load plastered on her chest.