In Crystal's room

"Holy shit, is it actually working?"

"I think so, sis. I feel really, really hot. And I can't stop thinking about you."

She pumped her fists and patted you on the back.

"Don't worry, little brother. Your big sister Crystal's gonna take good care of you. Take off your clothes and get on your knees."

You did as she said. You thought you'd be cold without your clothes, but you felt like you were burning up. You felt a **** need for Crystal to wrap her arms around you. You touched your body imagining it was her touching you.

"Please Crystal. Hurry. I can't take much more."

She stood over you.

"Oh my god, it's like you're in heat. This stuff is amazing."

She started rubbing your arms and back. Each touch was electricity arcing to your brain.

"That feels so good," you moaned. "This is crazy. I can't stop myself."

"Neither can I," she murmured. "How does it make you feel when I do this?"

Crystal unbuttoned her pants and took out her cock. You were more than a foot away from it but the smell hit you the moment she'd taken it out. You took a deep breath in through your nose.

"Smell good?" Crystal said. "Come and get it, little brother."

You crawled forward but she backed away. You tried to move faster but she kept moving her dick just out of your reach

"Please don't tease me, sis. You don't know how this feels. I need you."

"And I need you to obey me. You'll get this if you do what I say."

"Yes. Anything," you whined.

"Wonderful. Hmm... Bark like a dog."

"Woof woof." You didn't even hesitate.

"Hahaha, oh my god. You're hilarious. Now... Roll over."

You flip onto your stomach then back again.

"Please, Crystal. I'll do anything."

For a second she looked worried. How much power was this thing giving her over you? She gulped and waved you over. You gasped and shuffled over on your hands and knees. Her mighty rod glistened from a thin sheen of pre-cum coating the head. You took it into your mouth.

It was heaven! Ambrosia on a stick! The moment it touched your tongue your dick spurted onto the floor. You lapped up her pre and desperately sucked at her for more. Crystal moaned, overwhelmed by how much energy you were putting into sucking her off.

"Little brother... You want it bad, don't you?"

You tried to speak around her cock. You wouldn't dare take your mouth off it for a second.

"Yesh. Iss sho goo. You tasht amajing. Jusht sherving you maksh me cum."

"Holy shit. I'm gonna make you mine, bro... All mine..."