Start fingering her

"You know..." You start as you slide your fingers inside her, rotating and curling them slightly inside her, making her moan as she closes her eyes and leans back, her hands on your back. You move upwards with another hand as you unbutton a couple buttons on her top, but not completely and nuzzle your face against her chest, your lips brushing against the top of her bra-covered breasts.

A moment later, you back up slightly and slide your fingers out of her. She turns to face you quizically and pouts. "Why..." she begins but before she can complete her thought, you reach down and pull her panties off, dropping them on the floor before leaning in swiftly and planting a kiss on her lips. "Umph-" as her sentence and thoughts are cut off.

Sandy's hands trace along the side of your head as she holds your head in closer to her, kissing you, her tongue swirling inside your mouth as she makes out with you. She spreads her legs further and pulls you in close as she does so. Noticing her thighs widening besides you, you reach back in between her legs as you slide your fingers back into her, curling them inside, making her squirm and moan into the kiss.

There is a click as the door opens again and Sandy, in a better position to manipulate you this time, pushes you off her as she slides off the counter, turns around facing it and buttons up her blouse. She quickly pulls a random stack of papers and begins perusing them. You panic and slide down onto your knees, to hide from whoever entered. You were perfectly covered by the counter unless someone bent and peeked over inside.