Teased and then release

"Sis, I am going to cum." Peter says - the sight of his sister sucking on his cock was clearly too much for him despite having only just blown his load.

The sound of that draws a grin from Emily and she starts to jerk him faster.

"Oh are you going to cum baby brother?"

He gets a pained look on his face and nods urgently.

"Where do you want to come?" Emily's hand is a blur on his cock. Peter says nothing and continues his pained/focused expression.

Emily frowns and lets go of her brother's cock. He groans in frustration and tries to reach for himself but she bats his hand away.

"No." She says sternly. "Tell me Peter, tell me where you want to cum."

He looks at you for help. You realise you have been casually playing with yourself the whole time. You shrug.

Saying nothing is kinda my super power.

"Tell me baby bro." Emily says, teasingly taking hold of his hardness again.

"Your pussy!" Peter blurts out.

Emily's eyebrows raise in surprise. She starts to gently stroke him.

"That is very bold." She says. "But lets start with this."

On that note she dives back on to his cock, her cheeks hollow as she clearly applies pressure on his manhood.

"OH FUCK Emily!"

Peter starts thrusting into his sister's mouth and you see his cock spasm as he empties himself into her.

Satisfied, she pulls off his dick opens her mouth then closes it, gulps and reopens her mouth.

"All gone." She giggles.