You're skillfully trained

You feel yourself slip into a daze as your throat is fucked relentlessly, barely conscious of anything except the hot throbbing cock filling your mouth. You find yourself not only allowing Helen to throat-fuck you, but bobbing your head in response, oddly relishing the feeling of the massive piece of meat sliding in and out of your throat...the faster and rougher the better.

Frustratingly enough though, your mother seems to gradually slow her pace right as you're getting into it...you compensate by bobbing your head up and down on her huge cock faster and faster, even though you can barely breathe.

In your addled state, you barely realize that before long, your mother isn't moving at all, and is just sitting back with a hand casually resting on your head as you frantically suck her cock like a pro. You dimly hear Elsie, Fiona and Allison chattering, but aren't paying enough attention to pick up what they're saying...it's clear that you've got an audience though.

A light tug on your hair is enough to get you to focus your groggy mind on your mother as she speaks in a rather breathy voice. "That's good, sweetie...I'm going to cum...so swallow it all."

You feel a strong urge to swallow your mother's load successfully, and as the cock in your mouth shudders ominously, you go as deep as you can, making sure all the cum will shoot right into your throat. You're just in time, as with a moan of pleasure, your mother begins pumping load after load of thick semen deep into your throat.

You can feel the tension in the massive cock in your throat spike upwards just before each glob of cum is deposited deep inside you and you struggle to swallow your mother's 'milk' as quickly as she gives it to you...you fall behind and have to pull your head back, allowing the build-up of extra cum to flood your mouth as well.

By the time your mother's seemingly endless orgasm is over, you've got a large amount cum not only in your belly, but also in the parts of your mouth that aren't occupied by cock... Your aching cock has been leaking pre-cum all over the floor beneath you for some time now, though it hasn't had the direct stimulation you'd need to cum.

Helen lets out a satisfied sigh, slowly pulling her cock free of your mouth and causing a little bit of semen to dribble out from between your lips. The way her hand tenderly caresses your head wordlessly says all you need to know about her opinion of your blowjob.