Elder Thing Breeding [Internal] (Patreon)

Anatomically, the elder things were "kinda" similar to humanoids, but with some biological differences.  When he released his fluids into her, it felt as if she had an inner mouth who was actively sucking the semen out of his bellend. He hoped that she was not host to a parasitic organism replacing her birthcanal and uterus.  Seeing her weird anatomy and tentacles made his imagination understandably run wild.