The fear of Granddad catching me

I find it bizarre how the fear of something can be a driving force for arousal. It gets the endorphins pumping and the blood pumping as it awakens all your senses. The thought of getting caught masturbating in public has always been a turn on for me but what about a relative catching me. Granddad was fast asleep in his easy chair wearing just his bathrobe and socks. The strong scent of cigar smoke hung thick in the air and a blue haze lingered in the room. I watched his lip quiver as he snored loudly and a line of drool travelled from the corner of his mouth down his silver stubble on his chin. A thought entered my head and the more I contemplated it the more I wanted to follow it through. It was risky but than that in itself added to the desire and I stood and watched for a few more moments as granddad continued to snore. He had consumed several whiskies and I knew he was out cold but there was always that slim chance he would wake up, that slim chance I would be caught. The fear was part of the aphrodisiac and my fingers trembled as I undone my pyjama shirt buttons one by one before removing it fully. I stood in just the elastic waist bottoms. My fingers slipped under the waistband and inched them down as my eyes fixed on granddad checking for any slight move to suggest he would come around but there was none. I felt the pyjamas bottoms fall to my ankles and stepped out of them before kicking them across the room. I picked up my pyjama shirt and tossed that to where my bottoms had landed, well out of easy reach. I stood feeling vulnerable and exposed but was already getting aroused by the thought of getting caught. If he began to awake now would I get to my pyjamas in time and would I even manage to get them on. My dick stiffened quickly at the possibilities and I felt a heady rush that was intoxicating. This only fuelled me further and as I stood naked I began to stroke my dick. I wondered how he would react if he caught me. Would he punish me or would he just be in shock at my brazen display? I told myself I was a dirty lad but that only added to my deepening arousal. I stood stroking excited at the thrill of my risky behaviour and then another thought crossed my mind. A strange curiosity that nagged at me and a voice at the back of my head said Do it, go on, just a quick peek, go on. I took a few deep breaths as I stood my throbbing hard dick in hand as I contemplated my next move. Would I dare? Could I do it? The funny thing about being really horny is that you get the courage to do things you would otherwise would not... When the balls are full the brain is empty!!! I took a step forward and then another until I stood right up against the chair where granddad slept. My hand was still gripping my dick tightly as I trembled but still I continued and I crouched down. Slowly and ever so gently I began to loosen the fabric belt that was tied loosely around his waist. Then as the two ends of the belt were separated I began to separate the material that draped around him. Bit by bit I separated the material and with each movement I exposed more of the bare flesh beneath as I held my breath. My cock throbbed like it had never done before and the excitement was exhilarating. The material was parted all the way down to just below granddads belly button and I could just see a tuft of thick course grey hair sprouting free. I took a deep breath as my hands held the edges of the material and with my dick aching in anticipation I slipped granddads robe open fully. My pupils dilated as I took in the sight before me. There flaccid below a silver crown of Corse hair hung his thick uncut cock. It was not long but chunky and had a long over hanging wrinkled foreskin. His balls were the size of two goose eggs coated in pale pink wrinkled flesh with a few stray silver hairs. Overcome by the opening of my prize I began to stroke frantically, my breathing becoming fast and shallow as I stared at granddads exposed manhood, taking in every detail and every wrinkle so that I would remember the moment, breathing in every aroma in the room to help etch that moment in my mind. The excitement, the guilt, the thrill, the fear and the arousal all rolled into one tipping me closer and closer to the edge. I groaned as I thrust my hips back and forth against the motions of my hand and every muscle in my body tightened. I was so close now that the trembling of fear was replaced by the trembling of my orgasm. Short sharp laboured breaths followed by a sharp intake of air. I lowered my head and pressed my nose against granddads socked foot and at that same moment the flood gates opened... I opened my mouth against the sole of his socked foot as I felt my hot load release. My depraved act had brought me the ultimate ejaculation and part of me knew it would not be long before I sort this natural high again.