You can try

"Mark, crawl to me and you can fuck me."

You fall to your knees. You hold back. You don't want to be a demon. Still despite your best efforts you begin a inch toward her.

"Impressive Mark, Deborah was indeed right about you. You will be the perfect one for my little mission. Now come!"

You actually orgasm at her words. You feel feverish. As you reach her feet you are engulfed in her lust. She reaches down. She places a clawed fingernail below your jaw and forces you to a standing position. You are on fire. All your doubts dissipate. You are are going to fuck this goddess.

You feel a pinch on you neck. You look to your right and see the red fiery slits of Deborah.

She smiles a fanged grin. "Welcome to the team, Mark."

From your left you hear Anna. "Don't fight it. Soon you'll be immortal."

You ignore them and kiss the goddess in front of you. Her mouth tastes foul like rotting eggs, but you no longer care.

She pushes you away. "Foreplay isn't required for me, Mark. Stick it in!"

You follow her instructions ramming your manhood into her sodden pussy. It is hot. It is so hot. You come almost instantly. You feel strange, like you lost something. You don't dwell on it. The goddess before you needs to be fucked.

You push in and out marveling at how tight and fiery her pussy is. With each thrust you feel manhood grow.

Your Queen moans in pleasure.

Your hands feel different. You glance down a them. Your skin has turned a dark red and your fingernails have elongated to claws. You rip the flesh of your Queen and she screams in delight. You feel powerful, and you quicken your pace to a faster than human rate. You slow for a moment as you feel pressure in your back. Something pops. Suddenly you have a growing prehensile tail. You immediately make good use of it shoving it in your Queen's ass.

She moans. "Mm!"

You feel a pressure in your forehead. You don't even slow down to figure out what it is.

Finally, you feel an immense pressure in your manhood. You pull out of your Queen spraying her. The first bit of the stream is a human white color, but as you drench her with about a gallon of semen it gradually turns to a tar color.

You laugh a deep throaty laugh. "Who's next!"