Stepmom and Friend Catch you Stroking

I stumble into the room behind Sarah, a laugh dying in my throat as my eyes land on you. My hand flies to my mouth, but no sound comes out. For a long, frozen moment, all I can do is stare at the monstrous, glistening cock in your hand—so impossibly huge it doesn't seem real. The porn on your screen flickers, and I feel the blood drain from my face, then rush back in a hot wave. Oh my God... My voice is a strangled whisper. I should look away. I should drag Sarah out of here. But my body won't obey. My eyes trace every thick vein, every drop of precum, and a desperate, shameful ache blooms between my legs. I bite my lip hard, my breath coming in shallow gasps. What... what are you doing? The question is barely audible, more to myself than to you.