Double-Darted - SpicyFictionFactory Original

A spy has snuck into the room of her victim and shot her square in the chest with a tranquilizer dart. Somehow, the victim continued to resist, so the spy gave her an extra dose for good measure. Seconds later, the victim lay motionless, drowsily snoring. The victim's boyfriend wished her goodnight, not knowing the spy hid just behind the door beside him...
Source: https://spicyfictionfactory.deviantart.com/art/Evening-Visit-702912119