Michael's grandfather was fucking his young slut girlfriend as they lay on the bed, her back arched upwards and her legs spread wide open, showing off her shaved pussy and tight ass.The old man grabbed her hips and slammed his thick cock deep into her soaking wet hole, causing her to moan loudly.He held her close and began pumping his cock in and out of her, her body clenching around him tight.As they continued to fuck, Michael watched in amazement, wondering how his grandfather could do it.She wriggled around, trying to get more, but he wouldn't let her go.The feeling of seeing his own flesh and blood taking advantage of another person filled him with disgust, yet at the same time, he couldn't help but be excited by what was happening.Her tits bounced up and down with every thrust, her nipples hard and erect, begging for attention.She pushed her chest out towards him, causing her cleavage to spill over and creating a perfect target for him to suck on while he fucked her.With her body shaking and writhing, she climaxed, sending waves of pleasure through her body.She bit her lip and moaned, Yes! Yes! as her pussy clamped down around him, forcing him to slow down and then come inside her.As he pulled out, his semen exploded onto her walls, filling her up and leaving her wanting more.She licked her lips in delight as he kissed her and whispered, That's just for show.before getting up and walking away.Michael couldn't believe what he had just seen.Watching his own grandfather take advantage of someone else like that made him question everything he thought he knew about the world.But at the same time, the idea of having sex with a young and hot slut was tempting, especially when it involved fucking from behind.He couldn't wait until he was old enough to give it a try himself.