Your cock, of course!

"Mom Slut, I can't take it anymore," you say. "My cock is so hard that, if I don't get off soon, it my just explode."

Your mother shudders in a mixture of fear and lust. "But, Master... Your cock is so big. I d-don't... I don't think it'll fit."

"Oh, trust me, Mom Slut, my cock will slide in and out of your ass with ease eventually. Today, I just want to finish off in you quick. Then maybe we'll go on a shopping spree for some new toys for you."

You position yourself behind your mom's amazing ass. It's still red from the spanking you gave it earlier. You reach out and caress her cheeks. They feel warm and soft in your hand.

You bring your cock up and tickle your head just at your mom's sensitive back door, getting some lube on your tip. She quivers and whimpers a bit.

Without warning, you lower your cock to her pussy and thrust all the way inside in one motion. Your mom gasps from the sudden motion and moans in pleasure. You also give off a soft moan as your dick is fully engulfed.

Her pussy is so hot, tight, and wet to your cock. She obviously hasn't been given a good fucking in a long time.

"Of course," you say as you compose yourself, "I want to lube myself up in your wonderful cunt first, Mom Slut."

She moans softly. "Yes, Master John. A-As you wish. Give your slutty mommy a g-good fucking, please."

You don't need to be told twice. You start thrusting steadily at your mom's pussy. You grip at her ass and hips to steady yourself and keep yourself upright. Your mom continues to moan in pleasure.

"Do you like it, **** mommy? Do you like your new master's cock shoving into your pussy?"

"Oh, fuck, y-yes, Master," she says breathlessly. "I-It's so wrong, but it's so good. Please keep fucking me, Master. F-Fuck your Mom Slut's naughty, filthy pussy." She gasps a few times and you feel her pussy squeezing your cock. She lets out a moan.

"Did you just cum on your son's cock, Mom Slut?" you say with a grin.

She pants for a moment and says, "Oh, God... Y-Yes, Master."

"I suppose I'll allow it for now. But no more orgasms without permission, pet."

She gulps. "Yes, Master."

You thrust faster into her, your balls slapping against her as you gain speed. The sensation adds to your own pleasure. After a few more moments and making sure your cock is nice and slick, you slip your cock out.

Your mom gives a disappointed huff until you bring your cock back to her tight asshole.

"Brace yourself, Mom. Your son's big cock is going up your ass." You start to thrust your cock forward slowly, the head of your dick opening up her hole. She starts to gasp and suck air through her teeth in pain. Eventually, you wiggle your cock just enough so that your head pops in. Her ass already feels like the tightest grip you've ever felt on your cock.

"God, you're fucking huge, Master," your mother says. "My hole can't take much more."

You chuckle evilly. "I'm barely in, you slut. That's only the head of my cock."

"Oh, fuck, I don't know if you're going to fit."

"Oh, I'll fit. You'll just have to adjust." You start to thrust forward, inching your cock into her. Your mom cries out, but you ignore her. The warmth of her ass is so inviting. The lube that was already on her mixed with her own pussy juices is making it feel extra slick.

Eventually, you sheath yourself halfway up her ass.

"How are we feeling, whore?" you ask.

"Fuck me, master, you're f-fucking... f-filling me up. I feel too-too full back there... Are you all the way in y-yet?"

"Just about half way."

She whimpers. "Fuck."

Even though you're only half way in and haven't even started fucking yet, you're close to bursting. All this stimulation, plus the fucking and your mom's tight hole have pushed you right to the brink.

The question is, do you want to burst already or do you have the willpower to give this ass an actual good first fucking?