Now

Why should I wait? I just fucked my mom; my sister deserves that too.

I ordered her to move away so I could get naked and get up onto her bed.

"Now Sam, you'll get over me, take my dick in your mouth and suck it until it's fully erect. Then your hand will guide it into your pussy so you can ride me. The more you'll take inside the more pleasure you'll feel. And when I am fully, yo inside you, you'll get an orgasm. Understood?"

"Yes, it's clear."

"Well, do it then."

As I just finished my sentence, she was already sucking me very eagerly.
It didn't take long before my was hard.
Without hesitation, she assumed the position and impaled herself down on my dick.
All the way in at the first go.
As instructed she started to spasm and she squirted over my cock. For a moment, I feared that she'd loose her balance and fall off the bed.

I remembered then that I hadn't given her more instruction.

"Now Fuck me, ride me until I come, and then you'll have another orgasm as well."

Sam went bobbing up and down on my dick, sometimes with small screams. Pain or pleasure, I didn't care. My climax was nearby and I savored the moment.

My dick spurted a copious load of sperm inside her and she squirted again.

We were both now panting, and after a moment I slowly pulled out of her and got up.