She is watching your luscious hair fall over your eye as you begin to work in earnest on her pussy, your tongue sliding round and flicking up, round and up, in a way that she has never experienced before. Her breath catches in her chest, her back arches as she tries to push herself onto you harder. Her cheeks flush lightly as her body readies itself.
She knows you can feel the tension in her frame, and you gently start to push the fingers of your left hand down the inside of her thigh, between her lips to the waiting darkness below. Palm upward, your middle finger slides in, exploring the inner surface till you find that rough patch that every woman has, and start to massage and stroke the inside end of her clitoris even as your tongue works tirelessly against the exposed end.
She's never felt this much before, her boyfriend can't ever know what she wants, needs. Can't get it right. Oh so right. It's too much. Her body tenses again, her toes curl back, her breath intakes sharply. The warmth that has been building steadily finally explodes into the first wave of an epic orgasm that wracks her senses. Juices flood her cavity and you can taste the orgasm even as the shockwaves course through her. You don't stop just yet of course, your tongue still rolling around her clit, your finger still inside her, your hand grasping her stiffened nipple a little tighter.
The onslaught of pleasure overloads her and a low moan escapes her lips, turning to a squeal as another breaker crashes across. She pushes on your forehead to break the connection, she can't take any more, she needs to recover before she expires, and you reluctantly retreat, sitting back, wiping her juices from your chin. She's still rigid under you, breathing heavily, as you lean forward to kiss her, to get your reward...
I see her jump a little in her seat. Her boyfriend has asked a question, noticed her eyes miles away, asked it again a little louder. Broken the reverie. You've turned the corner at the end of the hall by now, gone from her sight. I see her re-cross her legs under the table, mutter an answer, and lean back in her chair to wait, wait for you to come back round the corner at the bottom of the hall, so she can see you again.