Abbie

The parents and brother of your niece died in a horrendous car crash, only little Julie survived because she was not in the car. As her only relative you have to take care of her. Everything goes fine until it's sleeping time, when Julie tells you that she cannot sleep unless you put your thingy into her little pussy. Her brother always did do that for her. She knows it's weird and wrong, but she got used to it and cannot sleep if you don't do so. So can she please sleep in your bed and can you put your thingy into her pussy? she begs you cutely. What can you do after she just lost her family? Of course you need to give her as much warmth and care as you can, no matter how weird it is.

Spoiler: Julie told you only half of the truth. Actually she needs to come before she can sleep. It's just much easier for her to make herself come, when there is a penis in her vagina. Her plan is to wait until you sleep and then to start rubbing her clit. That's how she also always did it with her little brother, only that his cock was a lot smaller