"Yes, Mistress." she said

Sarah poked her asshole with the tip, but once that entered, she got rougher, putting more than Elena's ass could handle, in.

Elena screamed as Sarah slammed into your sister's ass, making sure you watched every second of it. You watched entranced, while Elena screamed louder every slap Sarah gave her ass "Rub her pussy, but she doesn't cum, Emma." she told you, almost forcing you verbally to run Elena's pussy.

Elena was moaning and screaming from the sensations, and you could tell Elena was getting hornier by her wetness that was starting to coat your fingers and around her pussy. She was close to an orgasm, but you stopped "Sorry, orders, sis." you said, knowing if Elena could move, she'd stomp her foot or form a word. Sarah slowed down, pulling out slowly, then aimed it at your mouth. You knew what to do, suck it.

After sucking on the fake cock, Sarah flipped Elena over "Em, how hard did she make you cum?"

"Very. I almost collapsed." you saw Sarah form an evil grin, then rammed in hard, fucking Elena's pussy with the strapon like she owned it.

Elena screamed, gripping the sheets as her huge tits bounced, encouraging Sarah to go harder. "I thought Vampires were fast." you taunted Sarah, which lit a fire. She now used her superior speed to fuck Elena ruthlessly.

Sarah pulled out as Elena's body went tense and arched her back. She was having an orgasm like yours, but much less shaking. After it had passed, she was breathless and limp "Shit, the two of you made me turned on too much. Em, lick me." Sarah said, taking the strapon off.