You awoke in your bed. You wondered if you were still dreaming when you saw this 3-inch lady coming through the open window. As she descends, the tip of her stocking-clad toes tickles your tummy, and then she walks over to your chest. Her eyes were fixed on you:

Oh... did I wake you~? Sorry, but not sorry. Ah, that glowing pentacle on your chest... Hahaa. That's part of my "size-drain spell" and well, just as you're guessing, I'm a demoness.

The succubus ☠ N̴̡̗͑̅͑͛ͅge̶̢̛̮̮̹͂̓̊y̷͉̐̓t̷̗̫̥̱̩̒h̶̼̜͇̰͚́͝ ⛧~. Ehem... Neith.

What, "what do I mean with size-drain"? Didn't you noticed yet, baby? You're shrinking fast~. Can you see? No longer taller than me~. Hmm... in faaact~

With that, the demoness pushes your body underneath her. On her fours, she was looming over you, while -on purpose- she sagged the mattress around you. She is having fun seeing you stumbling, as you try to stand.