Mike, her younger Twin Brother.

Mike lazily shuffled out and into the kitchen. Same as always. Thin, with one mess of black hair and bright brown eyes that fought valiantly to stay open. Still half-asleep her sibling looked around the kitchen and noticed her.

"Mrnin..." he muttered. He was probably sitting by the PC half the night again. He opened the fridge and took a bottle of OJ to drink. Sat down and poured himself a glass, while rubbing one of his eyes.

The incubi spirit was getting comfy at the moment. It had joined into Sarah during her dream last night and was successful, now it gathered enough power to have some more fun. Siblings were great material. Hormone-powered teens that had mostly sex on their minds. And beside that, **** is always exciting and perverse. With time it'll make sure she has all holes filled with her family member's cocks. But right now it wanted to take things slowly. To get a strong grip on Sarah and all around her.

It was the incubi's work that Sarah noticed something. Her brother was wearing only t-shirt and briefs. That wasn't surprising, he often shows up like that in the morning. But now Sarah's eyes caught a detail she never saw before.

Something was poking out of the briefs, just along the left leg. Something that resembled...

Wow, her brother must be hung like a horse.

Mike adjusted his seat and whatever it was, hid deeper now but could it really be his cock? A lot of time passed since she saw her brothers naked, but she'd never suspect Mike to be so... generously endowed.

Incubi reached out into her mind and fixated her on the idea how big her brother must be. And how fascinating it'd be to see him in full... glory. The demon used his powers to slightly increase her horniness. Now that was just an appetizer. As the fun was just about to start...