What choice do you have?

You slide down to kneel on the floor.

Your mom's thick black member fills your vision. Grabbing it by the base, she gives it a few tugs.
"Have you ever seen a cock like this?" She says.
"Um- I- Ah-" You're rendered speechless.
"You wouldn't have. Hell, I haven't. And I've, ah, got a bit more experience with them than you do."
She puts a hand on the back of your head, using the other hand to lean against the wall. This does double duty of steadying herself and getting close to you.
"You don't know what your doing here, do you?"
You shake your head.
"Open your mouth."
Your mouth drops open. The fat tip of her cock slides past your lips, the girth of it all making it hard to even breathe. You expect to gag, but the urge to do so never comes. It makes sense, the woman who owned this body must have had experience in this sort of thing. Mom manages to get several inches down your throat.
She looks down at you, her long dreads hanging around her face. She has a big grin on her face.
"Not easy, is it, dear? Don't worry, you're doing great." Hearing this big black guys voice talk in the same way that your mom does is doing weird things to you.
"Now, try not to **** while I do this..."
She slowly moves her hips, pulling her cock out just a little. Then she thrusts, sending it right back down again. It startles you and you let out a squeak, the sound muffled by the thick meat. You can't help but throw up your hands and push on her pelvis, to no avail.
Mom giggles, a strangely girlish noise to come out of a baritone like that.
"Feels weird, right? Your dad did that to me when we first started going out. You'll get used to it."
She pounds into you more and more. You feel a little suffocated, between being pushed up against the wall and Mom stuffing you full of her cock.
"God, your mouth feels good!" Mom says. "Do you know how hard it's been, watching the three of you prance around with those tight little asses?!"
You're not sure if she expects a reply.
"It's taken everything I have not to- ghn -throw your father down and plow him like a cornfield. And your sister?! Ngh- She looks so nice in those skirts! You know the ones I'm talking about."
You do.
"And you? Oh, I just couldn't stand it anymore. Seeing you there, watching me... I don't even care that you skipped school."
You try to say something in your defense, momentarily forgetting what was happening.
She stops you. "Ah, ah, ah..."
"What did I tell you about talking with your mouth full?"

This seems to set her over the edge as she pulls her dick from your mouth. You pull in a huge gasp of air.
"Oh god, Mom, I-"
You're halfway through saying something when she cums all over your face. Huge ropes of white-hot jizz spray all over you. Some of it gets in your mouth, which you don't find un-pleasant.
"Fuck, Mom!" You say in shock.
"Watch your language, young man!" She says.
God, why does that get you so hot?!
Mom goes to get a towel for you. You glance up and get a eyeful of her ass. Tight and muscular. Her body was a football player right? Makes sense.
The sight of this puts you into a frenzy. It drives you wild. You slip a hand into your panties and between you legs. You barely know what your doing down there, but whatever it is must be working. You grab your chest, practically mauling your boob.
You let out a deep moan.
Mom turns to hand you a fresh towel, stopping short once she sees you.
"Um. Honey?"
You bat the towel out of her hand.
"Fuck that!"
"Zero!" She says indignantly. She seems to be more concerned that you're swearing right now than if she just put you into a sex frenzy.
"I don't care anymore! Please fuck me, Mom! PLEASE!"