Give her a treat.

You and Melanie deserve to bond a little bit. And what better way to do that than to do the nasty?

"Alright girl! Want a treat?" She sits up right in front of you, panting and making little "Ruff! Ruff!" noises and wiggling her ass in excitement. That's a yes, then. You undo your fly and pull out your dick, which is at half-mast.

There must've been a pretty pervy scientist in the lab that day because she knows exactly what to do and starts giving your shaft long licks. It isn't long until you get fully hard. You put a hand on the back of her head and shove your dick in her mouth. The nipples on her pert breasts perk up as you scratch her behind the ears. "Good girl!"

It doesn't take long for you to cum in her mouth. She swallows as much as she can.