Yes

"I guess.....yes."

" Good answer sis, you're going to love this! "Sarah locks eyes with Rachel and tilts her head back, hisses as her inch long fangs extend. Sarah starts to kiss Rachel again. Rachel at first is hesitant but lust engulfs her. They kiss deeply and Rachel feels her tongue bleed from one of Sarah's fangs which causes her to moan. Sarah leans Rachel on her bed moves her hair away from her neck. Kisses and licks her neck. With a soft hiss Sarah bites.

--

Rachel wakes up in a haze. Her body is buzzing. There is a sensation. Her pussy? Yes. Someone's licking it. She looks down and sees her older sister tonguing her clit. "Oh god, lick it, lick it Sarah. God, you're making me feel so good. God, I'm gonna cum!" Rachel squirts all over Sarah's face.

"Hmm....that tasted good you little vampire slut."

"Vampire? That was real?"

"Yes it was sis. You have very sexy fangs now. Wanna bite me?"

Sarah smiles, showing her fangs and offers her wrist to her younger sister. Rachel, thirsty, sinks her fangs into the wrist and takes a sip. "Hey let me go shower after you squirting all over me and we'll get you some gorgeous woman to feed on.