Female mantis often bite the heads of their paramours off after mating. This behaviour is often attributed to ensure the survival of the female and her offspring. With that in mind... Why would it be any different for a mantis-human hybrid?

Orchid is an anthropomorphic humanoid hymenopus coronatus. And so, while she's carrying embryos, she's also currently being a cannibalistic mom, eating the monster man she had mated with. And once she finishes, she will get to work on setting up everything so she can give birth to her eggs.

After what seems like forever, her eggs are eventually hatched. You, and your siblings, are finally introduced to the world.

"Oh, how lovely!" She giggles as she helps clean off each of her newly hatched babies, including you.