Explosively

Matt lay back and let his sister and mother go to work on him. His sister held his dick in both of her little hands while she plunged the tip into her mouth. His mother was a little slow getting into it but, as the minutes passed, she seemed to approach her task with more enthusiasm, stroking and caressing his balls while his sister sucked.

He looked down at his mother's face. She seemed intent on her job, her eyes focused on his balls and on the dick that vanished and then reappeared from her daughter's throat.

Karen looked intent as well, seriously trying to take his dick into her throat, then gagging and coming up for breath. She kept her hands squeezing and stroking on his cock the whole time whether she was giving her throat a break or not.

"I know I can do this," she said in one of those breath breaks.

"You can. You're the world's best sister."

"I know. But I want to be a better cocksucker than {if momjob+true}those Chinks."

"Vietnamese."

"I know, I know." {else} Natasha and Tanya.{endif}

Then she dove back to her job.

Her tits jiggled with every head-bob and he reached over to stroke one. Which gave him an idea. "Mother, shift up here. I want to play with your tits while Karen sucks me."

Their mother shrugged. "Why not?"

Heaven. Letting his sister suck his dick, his mom stroke his balls, and squeezing on both of their tits.

{if momjob=true}If he hadn't gotten a blowjob from the Phuan sisters a few hours earlier, he couldn't have held out as long as he did. Finally, though, he was ready.{else}Considering he was living his fantasy, it didn't take him long to be ready.{endif}

"Coming," he called out.

He expected Karen to keep his dick in her mouth. After all, she was working on being able to swallow a whole load and this was a good chance to practice. Instead, though, his sister moved her mouth away, increased the stroke speed with her hands, and aimed his dick at their mother's face.

He shot wad after wad of cum all over her face, hair and tits.

"I love you, brother," Karen said.