You accept

“All right.” You say.
“Really?” Keyla replies with slight surprise.
You nod and say, “Yeah, I’m ready to become a vampire.”
“Amazing.” Keyla says and hugs you again. “We can be like sisters then.”

That said, Keyla starts preparing for the ritual. She made a cut in her index finger and starts to draw a lotus symbol on a flat surface in the cave you’re hiding in. She makes it big enough for you to lie in, then picks up your body and places you in its center.
Once you’re in position she says you need to be naked for this and takes off your underclothes. When she does, you get another look at your bald pussy. Oh right, Keyla ‘shaved’ that last night. Then Keyla removes the bandages on your neck, chest and arm. You get another look at the breast where Keyla fed on you. All the evidence that is left are two small puncture wounds. They seem more like some insects bitemarks.

Once you lie naked in the lotus-circle, Keyla starts drawing a snowflake on your chest. It feels weird to have the vampiress's blood on your chest. Mainly since most of the blood in her now has likely been yours originally.
“Are you ready?” Keyla asks.
“Yeah,” you reply. “Let’s do it.”
Keyla makes a small cut in your chest, in the exact center of the snowflake she just drew. She then undresses until she is topless, hangs over you and starts massaging one of her undead breasts. Her hands push from her chest to her nipple, milking her own teat until a red substance starts to gather at her nipple. Keyla’s nipple slowly lactates more blood until enough has gathered at her nipple. Then it drops, landing right in the snowflake’s center. The blood from her nipple mingles with yours and enters your body.

“Ok.” Keyla says as she steps out of the lotus circle. “Now we wait a bit.”
Is this all there is to it? Strange, you figured there would be more. But sure enough, something starts to happen.
Everything around you becomes black, though it is different from fainting. It is more akin to when you see the Burning Rose in your prayers. Yet now, you don’t see the image of the beautiful redheaded deity. You see a different woman instead.
This woman has long smooth white hair, which covers half of her face. Her skin is white as snow. Her breasts as smaller than those of the Burning Rose and her only visible eye betrays a red colored iris. This must be the Winter Lotus. The goddess of cold and darkness.
She raises a finger, smiles, then touches the center of your chest. You feel a sharp pain at your heart and instantly snap back to reality.

You scream and clutch your chest while you writhe in the lotus circle. It is your heart. Something is causing it to be in pain.
“Keyla!” You yell. “What is happening!?”
“Don’t worry.” Keyla replies. “You’re just dieing.”
Your eyes grow wide in shock. Really? Your life is about to end?
“Vampires are undead, Sabine. That’s why our bodies are so cold.” Keyla explains matter-of-factly. “I thought you knew.”
You do know, but you didn’t think you yourself would actually die. Another jab of pain originates from your chest and you scream in pain.
You try to breathe gently and focus your attention to your chest. It feels like your heart has trouble beating. Like the Winter Lotus has wrapped her hand around it and is squeezing hard to **** it to remain still. As the seconds pass by, you feel your heartbeat slow down. First it beats once per second, then once every two second. It tries its best to struggle against this suppressing ****. Fighting its hardest to stay alive. But it’s a losing battle and soon, your heart beats one more time, then remains silent forever.

The pain disappears and is replaced with cold. This coldness spreads through your chest, making your skin tingle. You put a hand on your breasts and feel the warmth ebb away from them. Immediately after your breasts lost their warmth, they also start losing their color. Your skin was already pale by comparison, but now it look truly white.
The coldness spreads to the rest of your body. Your arms legs and even your head become wrapped in this cold. When your entire body has lost all warmth and color, the transformation is complete. That actually wasn’t as bad as you feared it would be. Yes, you died, but you imagined it to be a lot more painful. You're glad you were wrong.
Keyla enters the Lotus circle and places her hands on your shoulders.
“Congradulations, Sabine. You’re like me now.”