Fuck his ass

Fuck subtly. You want his ass right now. You enter Mark's room with a purpose you have never known. You whip the loose sheet off of his sleeping frame to discover his very hard (and thick) seven-inch rod. His scent is unbearable now.

Your brother's legs are slightly parted as he sleeps, but you need more access. Without much thought about whether he will wake-up, you grab each of his muscular thighs and push them apart. He stirs, but does not wake. You mount the bed with your arms supporting you on either side of his torso. Your cock is nearly pissing precum. You grab your leaking fuck stick near its searching head and direct it towards his unseen boy hole.

Watching your cock head disappear below his ball sack, you feel it contact flesh. As your natural lube is deposited around his taint, you begin to feel your way. After adjusting lower, you find his entrance.

It apparently tickled Mark, because as soon as your cock contacted with his asshole, a small smile appeared on his face. A sudden urge to make that smile disappear drives you to make a decisive thrust with your hips. A pressure grows on your cock head and at the base of your pole. Your little brother's face turns to slightly confused scowl, then, his hole opens.

Your slippery cock head and about 4 inches of shaft suddenly disappears inside of him. The sensation is indescribable. You've never had your cock, including your old, pathetic cock, inside of someone. Every possible point of skin is wrapped in a tight, but soft, vice of flesh. Heat radiates down your shaft, causing the whole monster to flex and dig deeper.

The sudden intrusion does not go unnoticed by the host. Mark instinctively tries to crawl away. Before he even opens his eyes, he's screaming. You place one hand on his shoulder, and hold his body to your cock. He struggles again, this time focusing his eyes on you. Your grip on his shoulder increases. A strength you had never experienced before flows through your arm. With one motion, you slide his entire body down the bed, driving his ass further onto your cock.

He screams again, but now with all but the last few inches of your tool firmly in his ass, you don't care. Either through fear, or just in subconscious subservience, he remains still for a few moments. You take the opportunity to begin a relentless hammering of his boy hole. On the third stroke, you're balls-deep. His morning wood, which never subsided his now dancing on his belly. He finally catches his breath long enough to speak.

"Wh... what's going on? How are you so strong? What are you doing to me?"

"I'm fucking your sweet ass, bro. That's what's going on."

"Why? Why can't I stop you? Why me?" You're working up a good rhythm now.

"Because you have one seriously sexy ass."

"I.. I don't understand." You decide to slow down your pounding.

"Well Mark, I had something of a change recently, and I've decided to start taking what I want. And right now, that means your ass. I'm guessing you can't move because your body loves taking my big cock too much."

"No I don't! I'm not gay!" he screams defensively.

"Really?" You stop your fucking. "Alright then." You promptly pull out of his stretched hole and stand by the bed. "Then I should leave you alone."

You turn to leave, but Mark speaks up. "No, wait." You look at him as he wears a pleading, but confused face. "My ass really fucking hurts. It felt better when it was stretched." A smile creeps over your face.