She finds it arousing beyond all measure, duh!

Laura groaned as she watched Geraldine feed on her mother, all as Carmilla's hands moved up and down her body. "Do you want that?" whispered Carmilla, nodding at Geraldine and Christine entwined.

"Oh, yes, oh, fuck, yes, YES!" moaned Laura.

Carmilla's fingers darted to her cleft, as her breath played over Laura's neck. "Beg me for it," Carmilla whispered.

"Drink me," hissed Laura, "drink me, fucking take me like your mother is taking mine, do it, do it, please..."

Carmilla gave a throaty laugh. "Oh, I can't do that," she whispered. "I have to leave enough for everybody." She leaned in even closer to Laura's ear. "But I can have a little taste..."

Laura gave a happy whimper as she felt Carmilla's fangs pierce her flesh. The pain of the bite rapidly transformed into ecstatic pleasure as Laura felt herself almost swoon from the sensation...