My Mom's ass

I've been jerking off to my Mom's fat ass since I could cum, She would walk around in a bra and panties when I was younger and I'd always be turned on. As an adult I found a video of my Mom in an old phone of her bent over ass facing the camera in a gray thong with her pajama bottoms pulled halfway down her thighs jiggling her ass back and forth. I use the video to nut almost everyday since then (4 years), should I stop?