No

You hesitantly open your mouth, not sure what is happening. Her hand wraps back around your throat. You can feel her cock twitch in excitement against your butt.

"Keep your cute little mouth open. Nice and wide."

Martha's command makes your heart race. You open wider as she grabs her cock with one hand and guides it towards your rear. As the thick head of her dick brushes against your hole, you feel a shudder run down your spine. She doesn't enter yet, she simply teases herself.

"Fuck! Yes... You feel this too? Fuck!"

Her voice is strained and her grip tightens on her cock. She grunts as she teases both her dick and your butthole, savoring the sensation.

You are unable to suppress the whimper that escapes your mouth and then immediately shut it.

"No! Open your mouth!"

She commands you. Her voice is a strained whisper.

"I wanna hear every cute little whimper from my step-brother. Are you afraid of my cock? It's so big! You like that, right? You said it, remember?"

With that Martha suddenly thrusts her hips towards you and the head of her cock enters your rear. She pushes into you. The initial sting gives way to an unexpected warmth. Your mouth hangs wide open, unable to shut as you moan out loud.

Martha pulls you by your neck close against her.

"Fuuuuu... fuuuuck yes!"

You try not to clench down on her, allowing the penetration, even though it seems like you might rip at any moment. Your face burns with a mix of pleasure and embarrassment.

"You're such a tight little thing. It feels amazing!"

You can only whimper and moan, unable to respond.

Martha starts thrusting, her pace slow and deliberate. With every movement, she presses deeper into you, her thick shaft filling your ass, stretching you further. Your own hard member cock flaps in rhythm with her movements, slapping against your tummy.

"Keep your mouth open! Don't you dare close it!"

You moan loudly, feeling Martha's powerful hips thrusting relentlessly behind you, her cock filling you. Her hands grip you tight, leaving you unable to do anything but take her in, powerless.

"Look at your little dick flap around!"

She's pushing inside of you with more **** and faster, panting behind you.

"It's so tiny!"

She lets out a chuckle which ends in another deep groan.

"Tell your stepsister how tiny your dick is! Look down. Do you see it?"