King Arthur and the Grimoire of Lust - 30

The succubus venom circulated throughout Morgana's body changing it and causing her to convulse while Guinevere easily lifted and impaled Morgana onto her throbbing cock. Morgana moaned in ecstasy as Guinevere thrust her cock in and out of Morgana using her like a rag doll. "By giving your body and soul to the dark lord you'll become a succubus and share a part of his power. Are you ready to receive the dark lord's seed and become his whore?" "Yes! mistress!" "Cum! and surrender!" They both orgasm together as Guinevere filled Morgana's womb with her demonic seed corrupting her and binding her to the dark lord permanently. The demonic seed quickly became part of Morgana, accelerating the changes to her body as a pair of horns grew on her forehead. "You're now one of us, you shall serve the dark lord through me." "Yes mistress, I'm ready to serve and obey."