A sexy babe is fucked by demonic tentacles. Despite initially resisting, the pleasure is too much so she surrenders to her own corruption, moaning desperately and begging to be fucked harder. As she is fucked, she is transformed into a sexy succubus. Her skin turns red, breasts grow larger and perkier, nipples erect, horns sprout from her head, her tongue turns long and serpentine and her feet into hooves. She ruts and her moans grow more animalistic and desperate, deeper as her demonic essence takes over. The transformation should detailed and slow, not instantaneous. At the end she cums hard and surrenders her soul.