I think she's leaning in close to the young guy next to her, making sure he gets to see just enough of her cleavage to make him look, and crossing her legs just so a bit too much thigh is showing. She's teasing him about whether he has a Gf or not. Then she leaves him a while but always noticing he's glancing over.
She waits until their area is pretty empty then asks him to pass her a pen. As he extends his hand to her she takes hold of his hand, removes the pen, slowly open her legs and places his hand on her pussy under the desk. He panties are still on and he so he ribs her through them, pressing her clit while she types away on her laptop. She reaches one hand down and pulls the panties aside, whispering "slip two finger in there baby". She is soaking wet, and having to suppress her desire to moan loudly across the office...
