I've seen my mom do EVERYTHING-almost.
Purely a work of fiction- all characters are over 21 years of age.
Mom had never been shy around me. She was a single mom (most of the time) and she really liked to party and be "social". Mom was also totally beautiful. Not that mom was a tall thin model type, but she was a thick, big boobed curvy woman. She had pale skin with small freckles everywhere and natural red hair, that looked like it belonged in a shampoo commercial. All this to say, mom dated A LOT. She was also very casual about showing her body. Growing up I had not only seen mom naked- but I had seen her having sex a number of times. I was always a nosy kid, if I thought someone was hiding something from me, I would have to check it out. I barged in on my mom having sex a number of times- and was always greeted the same way,
"Jack, what are you doing- get out of here, then she would get up (in whatever state of undress) and close the door on me. I was always curious, and would snoop and spy on most all of her dates. Mom knew this and I now think she secretly got off on the idea of her own son wanting to watch her.
When I was 23, I was working but still living at home. In June of that year mom got a new boyfriend. I really hated most of the guys she dated, but her new boyfriend, Ron, was okay. He was always cool, never tried to tell me shit, and we had lots of the same interests- cars, Football and carpentry. He was a finish carpenter by trade which coincidentally was what I did as well (we didn't work together but ended up knowing a lot of the same guys). He would often fix shit around the house which was a relief to me always having to do it. In short I liked the guy.
I heard them having sex often, and while I was no longer the snooping kind who had to see what was going on, I have to admit what I heard, sounded pretty hot. It sounded like Ron was breaking my mom in two, and mom was loving every second of it. One morning during breakfast I joked that it sounded like they must have had a good night.
Ron laughed and said, "hell yes we did!"
Mom turn red and said, "nothing you haven't heard before."
"Heard, shit, probably nothing I haven't seen before!" Then she slapped me on the arm.
Ron looked puzzled- "seen?"
"Yes," my mom said, "this little nosy bastard was always barging in on me in comprising situations when he was a kid- he's probably seen everything."
"Probably?" I retorted.
"You haven't seen everything-everything, have you?", mom said as she turned a few shades of red.
Ron just busted up laughing- "well good, then we don't have to be so sneaky anymore!"
I looked at them with a questioning look, "That was you guys being sneaky?"
Again Ron busted into laughter, and we all ended up having a good laugh.
The next day after I came home from work, mom and Ron were sitting on the couch. Ron looked up- "how was work?"
"Good" I said, "what are you two up to?"
Mom replied, "we are getting ready to watch that new Marvel movie, do you want to watch it with us?"
I looked at them, "are you guys actually going to watch the movie or are you going to end up making out?"
Mom looked at me-"well if we do- it's not anything you haven't seen before, right?"
Ron quickly added, "Hell you might even like it." then mom slapped him on the arm and I with a smile, cursed him, "you fucker".
Mom got up off the couch, her house coat opening slightly to reveal a little boob and a flash of red pubic hair- she wasn't wearing any underwear. Mom said, "hurry and take a shower, we'll wait and I'll go and make us some popcorn."
While in the shower I looked down and noticed that my cock was just past half mast. I questioned myself- "am I turned on right now?" I realized I was excited at the though that something might actually happen. Maybe I would watching them fuck- did that turn me on? The thought of my mom letting me watch her get fucked was so hot. Thinking about this made my cock painfully hard. I thought about rubbing one out, then I thought "no, save it."- for what I wasn't totally sure.