Like a gentleman, hold in and let her finish first

Easing your cock back into Nancy's tight ass quickly makes you realize just how little time you've got left, and even if you're aching to fill her hot bowels with your cum you also feel that you want to enjoy her a little bit longer than that. Therefore you just give her a quick few strokes before pulling back out, replacing your fat shaft with two of your fingers while you get down behind her and start lapping at her pussy again.

She's obviously enjoying your administrations thoroughly as you eat her out while fucking her little butt with your fingers, her moans and grunts coming from authentic pleasure now rather than the more overly faked noises she was making at the start. Taking a good deal of joy yourself from being able to get this young slut off with such a dirty approach, you're soon giving her your best shot and play her ever faster and harder while she start shuddering in the precedence of a more powerful orgasm.

Soon her groans turn to squeals and gasps while her body spasms and quakes with the pleasure, her hands grasping at your desk and crumpling up several of your books and papers in search for something to hold onto while her climax catches up with her. With a final guttural cry escaping her lips you find her pussy gushing over with juices as she cums at your still working tongue, her sphincter clenching tight around your fingers and threatening to squeeze them right off while you drive her onwards through a long and powerful orgasm that slowly ebbs out into a series of lesser ones.

Then finally she collapses forward, ending up sprawled out and gasping for air on her front on top of your desk while you slowly stand up behind her with a knowing smile on your lips. If she wasn't yours allready, she'd definitively be so now as her body keep quivering in the aftermath of her orgasm and her sweet, sweaty face turns back at you with a deeply flustered smile...

Despite the break you're not really that much further from a climax yourself, your throbbing shaft being as hard as ever after the girl's spectacular finish. So, once again it seems like you need to choose where you'd like to spend the last moments before blowing your load...