31 Days of Monsters: Cambion

This one deals with the birds and the bees, so it's a little NSFW. When demonic Succubi and Incubi feel the desire to start a family the Succubus mommy collects sperm from a human male victim and then passes it on to the Succubus daddy. He in turn passes it to his next female victim who eventually gives birth to a Cambion. Cambions possess none of their parents seductive manners, but are prized among demons for their corruptive influence on human society. Cambions can be recognized by the absence of a pulse until age 7, and their dislike of signs of affection. They also hate cartoons and sugary cereals.

31 Days of Monsters 2014: The Pontianak

The Pontianak of Indonesia is the spirit of a woman who died in childbirth. She sleeps in banana trees in the day, and wanders the forests looking for victims at night. When she is near, you will start to hear her baby cry. The farther away she is the louder the sound is. As she gets closer, the baby's cries seem to recede until she is right on top of you. She kills by ripping out her victim's guts and eating them. If your eyes are open when she catches you, she'll tear out your eyes first and feed them to her child.
The Pontianak has a hole at the back of her neck. If you stick a nail in the hole, she turns into a beautiful mortal woman. If married, she is the perfect wife — as long as the nail stays in place. If it is removed, she will change back into a wraith and kill her husband.