This story takes place on the evening of Valentine's Day in 2018 shortly after I had recently turned 20. I woke up around 10 o'clock PM to get something to drink so I take my phone so I can use the flashlight but I notice the living room light is on so I put my phone away and I go to see who it is. The fact that it's only my grandmother and father that I live with I figured it would have been my grandmother because she has trouble sleeping often.
I froze the second I stepped foot into the kitchen as I seen my father naked and standing over my grandmother, his mother, who was wearing sexy red lingerie with her large busty tits out and on her knees in the center of the living room with both of his hands tightly gripped to both back sides of her head absolutely shoving his cock in and out of her mouth. He slightly kneels down a bit and pushing his whole lower half forward making his dick go in and out of her mouth without losing rhythm. I can't help but to look at my father's cock, and to see how fat, veiny and thick it was. It was easily 3 times wider than mine. I'm even more surprised to see how well my grandmother is handling her son face fucking her like this. I thought all the surprises were done but I then notice she's clawing into his ass cheeks with her nails doing her best to push her sons' rock hard cock even further down into her throat.
I can't fight the fact that I was turned on by this so I pulled out my phone and started taking video. It seemed as if my father was taking all his frustration out on his mother's mouth as I watch him thrust his hips back and forth at a fast pace, but my grandmother kept on sucking and even though he was forcing her head onto his crotch I could tell she's also doing her part and moving her head back and forth onto his dick with strength I've never really seen her use. I couldn't hear anything happening when I was approaching the kitchen, but now all I can hear is the spit in my grandmother mouth being swished around by my dads' fat cock and my grandmothers' tongue and lips smothering my dad's dick with saliva.