Doomwidow_tf_2 (Patreon)

If the victim is lucky, it turns into a Doomwidow female. While the skin turns into a dark and hard carapace, the insides change to make room for the typical a-sexual organs that are able to grow a male worm once a year: The vagina extends and grows deeper into the womb, creating a slimy incubation chamber right below the bellybutton. Pheromones for doomwidow males start to drip down from the newly grown and/or extended labia that ache for a male to screw into the invitational opening.