Caught Mid-Cumshot! Step Bro's Secret Pussy Addiction Exposed

The fluorescent office lights hummed, casting a sickly yellow glow on the cubicle wall. But inside, it was a sweaty, frantic hellscape. My step-bro, Chad, usually the picture of corporate smugness, was hunched over his keyboard, but his focus was shot. His hand—thick, veiny—was buried deep in the damp silk of his boxers. A low groan rumbled in his chest as his hips bucked against the cheap plastic chair. Suddenly, my shadow fell over him. 'What the fuck are you doing, step Bro?!' I barked, voice rough from lack of sleep. He jumped, eyes wide, a glistening trail of pre-cum already slicking his thigh. 'Just... working,' he stammered, but the lie was pathetic. I leaned in, inhaling the sharp musk of his arousal mixed with stale coffee. 'Bullshit. You're fucking yourself senseless.' I gripped his ass, squeezing hard as a thick, hot surge erupted between his legs. 'Take my cock deep!' I commanded, already unzipping my own work slacks. He gasped, eyes rolling back, as my erection slammed against his straining cock. 'Fuck me harder!' he choked out, fingers digging into the fabric of my jeans. The wet slap of skin meeting skin echoed in the silent office. 'Cum inside me!