My grandfather was my favorite person. Then I found the box in his attic.

I thought I knew my grandparents. They were always so kind, so loving, especially to me. So when my parents sent me to stay with them for the summer, I was excited to spend quality time together.
At first, everything was perfect. We'd go on picnics, play board games, and share stories over hot cups of tea. But then one day, while exploring their attic, I stumbled upon a hidden compartment in an old trunk.
Inside, I found a stack of grainy videos and a pile of Polaroid photos. At first, I didn't understand what I was seeing. But as I watched the videos, my heart began to race with dread.
There, on the screen, was my own grandfather, his weathered hands roaming over the soft curves of a woman I recognized all too well - my mother. The camera panned out, showing her naked body splayed across the bed, her legs spread wide as he positioned himself between them.
Please, Daddy, she whimpered, her voice high and breathy with anticipation. Don't tease me. I need you so badly.
He chuckled darkly, his fingers digging into her hips as he thrust forward, burying himself deep inside her. She cried out, arching her back as he began to move, his hips smacking against hers in a brutal. As I flipped through the photos, I saw the same depraved scene repeated over and over again. My mother on her hands and knees, my grandfather taking her from behind. Her mouth stretched wide around his cock as he fucked her face. The two of them tangled together in a mess of limbs and sweat, lost in their sick, twisted passion.
I was sickened, disgusted, but also morbidly curious. What other secrets did my grandfather have? What else had he done to my mother, to our family?
When I finally confronted him about it, he just smiled a wicked grin, his eyes dark with malice. If you ever breathe a word of this to anyone, he growled, I'll make sure my next video features you and your pretty little face.
Now I'm left wondering if he's bluffing, or if he's already planning his next move. Is this sick footage already out there somewhere, just waiting to be discovered? Have people already seen what he's done to us?
I need advice, guidance on how to handle this mess. But more than that, I need to know if anyone else has seen these videos, if I'm not alone in my horror and disgust.

Please, if you know anything, leave a comment. Help me put an end to my grandfather's twisted games once and for all.