Steamy Dreams
Backing off his cock, allowing a loud 'pop' sound to occur she asked, "Does big brother like?"
"Very much so," he nodded, loving she was doing this of her own accord, before adding, "Do you?"
"It's so big," she repeated, taking it back in her mouth.
He again smiled, knowing that she was making this decision of her own free will.
After another minute, he asked, "Does my slut sister want to get fucked?"
Her eyes went big as she took her brother's cock out of her mouth. "That would be incest," she pointed out, her hand still on his cock.