Tell Steven that Timmy is watching right now and make him cum.
From Create Your Own Story
You keep glancing in Timmy's direction. You just can't help yourself. You want to see the look on his face when he watches his father's dick pump your pussy full of his jizz.
"You want to fill me up, don't you? Fill me with your cum?"
Steven grunts his approval.
You grab hold of Steven's shoulders as your tits bob in front of his face. You slam yourself down onto his dick again and again, your fingers digging into his skin as you force his dick as deep into you as it will go. His exceptional length makes you wince a few times, but you accept the pain with the pleasure and don't stop for a second. You lean down to whisper into his ear, still fucking away.
"Fuck me. Fucking cum for me. I want you to explode inside of me. I want you to cum for Timmy."
You slowly pull your head back. Steven locks eyes with you. You smile an evil, victorious smile.
"He wants to watch us cum. Just give him what he wants..."
Steven doesn't look happy but he's too late. You're bouncing on his dick as fast as you can. His entire body has gone stiff. His mouth is stuck open and he's holding his breath unable to speak. That is, right up until a guttural moan escapes from his throat and he orgasms deep within your pussy.
Steven's mouth remains open. His eyes roll back into his head. But you haven't slowed in the slightest. You're not about to stop when you're so close.
Every time you bottom out on Steven's cock you can feel another stream of cum explode inside of you. It just keeps coming. You feel so full and you don't know where it's all coming from but you still need his cock. You're so close but you need an extra push.
You lean to one side and whip your head towards Timmy. He is standing out in the open now, only partially concealed by shadow. He's lowered his pants to mid-thigh and is unabashedly stroking his stiff cock to Mommy and Daddy's fuck show.
"OH my FUCKing GOD!!!!"
That's exactly what you needed.
Your body shakes uncontrollably as you feel Steven squeeze out yet another shot of cum inside you. He's never came so much or for so long before. You're barely able to contemplate whether knowing Timmy was there actually did something for him before you are completely lost in the throes of ecstasy.
As soon as you crawl your way back to reality you find that you've slumped forward, burying Steven's face between your tits. You lift your chest off of him and give him some air. His eyes are closed, but feeling free from the weight of your breasts he slowly opens them before speaking.
"That was... that was... what was that?"
You smile, pleased with the performance you both gave Timmy. Remembering what this was all about, you glance back toward your Timmy. You don't notice him at first but he's still there, just having gone back into hiding. You're not sure why he came out like that - maybe just for a better look - but you're extremely thankful all the same.
"I might be wrong, dear, but I think you like being watched!" You scratch your fingers at his chest playfully.
Steven furrows his brow and looks away. Maybe he doesn't want to admit it yet, but there's no question that the two of you haven't cum together like that in ages. Not since Heather and Jacob were younger. You might just be able to turn this into a more regular thing.
You carefully lift yourself off of Steven's cock, uneasy about the amount of semen in your vagina. As his mostly stiff head pops free of your hole your body shudders, struggling to hold it all in. But there's simply no way. Steven's cum quickly gushes out of you and back down onto his still impressively erect shaft. After a few seconds his dick is completely coated by your mixed orgasm. You watch Steven's dick twitch excitedly in the warm juices.
