'Fuck—go easy,' I hissed, but Mark just shushed me, leaning close. 

His breath blew hot on my ear. 'Relax for me, son. Let me get in there.' 

That word 'son' landed heavy, twisted with forbidden edge, stirring a sick thrill in my gut. His free hand closed around my cock, pumping slow to pull my mind off the ache, thumb rubbing over the slit to smear the pre-cum blending with the lube. Bit by bit, he worked in a second finger, spreading them to loosen me up, his eyes fixed on my face. We locked gazes—his full of control mixed with something raw, like he was giving me a hidden...