Help finding specific mother/son story

[hugeace007]

I need help finding a story I started reading but never had a chance to finish. It was a mother/son story. In it the son was watching porn, they stated it was mature porn, I suppose to indicate he was interested in women his mothers age. His mother walked in and caught him.
Later she was curious about what he was watching and went in his room and started watching the same porn. She got aroused and proceeded to start masturbating. Then the son walked in and caught her.
Unfortunately that is all the information I am able to give. I quit reading and then my phone died and I lost all of my open tabs. Any help would be appreciated. Thanks