When I Was 18, My Mom Would Watch Me Jerk Off

When I was 18, I was living with my parents and had a bit of a meth problem. I had a room in the back corner of the house, with a computer in it facing away from the door. I used to wait til just after my parents had said goodnight and then I would do a shot of meth, take my shirt and shorts off, and jerk off to porn until the sun came up. Eventually the porn got more and more taboo and I got pretty heavy into the idea of i****t. My mother wasn’t the most attractive woman in the world, as she was 58 by then, but she kept in shape, had a petite body and decent sized breasts. I used to spy on her showering often as a kid, and sometimes as a teen I would even sniff her dirty panties while I jerked off.
I’m not sure how it started, but my mother must have noticed that my light was staying on super late. She started saying goodnight and getting ready for bed with my father. But then she would come back to my room after my dad was asleep for varying reasons. She would say it was just to check up on me or to continue some thought or conversation that had come up earlier in the day. The excuse was always different and always plausible, but every single night she started coming to my room to talk after my dad was sleeping. Because of this, I would leave my door cracked about 8in after everyone went to bed, and then I would do my ritual. I would shoot meth, strip down to my boxers, and watch i****t porn on my computer with the volume low but on, and my back to the door while I stroked my cock. Now, no one could see what I was doing or watching unless they opened the door or poked their head in.
My mother meanwhile would shower and get ready for bed, get into a robe or nightgown, read or whatever for a bit, and then come to talk with her youngest son. I could sense when she was at my door, and sometimes I could even hear the footsteps quietly approaching. She would stand there for a while before suddenly throwing the door open, and asking if she could talk. I would quickly close the browsers (making it obvious I was watching porn), and she would act embarrassed and ask if it was a bad time. I would always tell her no and invite her in. My mom would shut the door and sit on my bed and talk to me about whatever random thing. I would sit there, just wearing my boxers, with my hard cock tenting them, and intently listen to her. She would constantly lick her lips and glance down at my bulging dick while she talked.
Eventually I started laying fully naked on my bed and jerking off. She still kept peeking in and then opening the door… acting embarrassed when she “caught” me. But I’d always just pull my boxers up and apologize and invite her back in. One time, she came and sat down on the bed next to me to talk about some song, and my dick head was literally poking out of the top of the waistband of my boxers and she looked at it multiple times very obviously. I started subtly running my hand up and down my shaft while my mom sat next to me (our knees were even touching) and talked about dumb bullshit. I would make it obvious that I was glancing down her blouse or robe and staring at her freckly tits while I stroked myself. Then, as soon as she left the room, I pulled everything off, laid down with my eyes squinted (so I could see but it looked like my eyes were closed) and started jerking off while loudly moaning “yeah mommy! I wanna lick your hairy pussy mommy! I wanna fuck you so bad. Please let me fuck you mommy! I want my cock inside of my hot mom!” I could see her face in the door watching me and listening to me jerk off to her. Then after a couple of minutes, she opened the door again and pretended once again to have accidentally caught me jerking off. That time I actually came in front of her. I shot pump after pump of thick cum onto my stomach while my own mother stared in awe. Then I acted embarrassed and apologized and she covered her face and apologized and left the room. I know for a fact my mom fingered herself to that image that night. We never acted on it more than the light touching and staring and unmistakable sexual tension we had while we’d talk and ogle each others bodies and I’d secretively massage my hard dick in front of her. I wish we had. But maybe it’s better than we never did.