Spanking story from an xham friend

When I was growing up my mean mom made me rub her feet all night if I misbehaved or didn’t do what she told me to do, as I got older and developed a fetish for my own mother’s feet, I would purposely not listen when she got home from work so I could rub her sweaty feet, and one day she noticed my erection while I was rubbing them and she made me pull my pants down and show her. At first I said no but she yelled at me for being hard touching her and forced them down. Ever since my dad left us last year, she’s been slowly treating me less like a son and more like a husband, and I suppose grooming me for the job, she laughed at me and said she knew I liked my punishment and sat down and made me get on my knees in front of her. She told me if I like her feet that much it’s time to suck her toes and shoved her foot in my face, I turned my head and said no, big mistake, she seemed to get excited yelling an order to do what she says or else. So I sucked her after work sweaty toes, she leaned back and said "that’s my good little dicky" and told me to rub my cock for her while I sucked, at this point I was embarrassed how hard and turned on I was getting so I just rubbed it like she said, and I looked up and saw her pull her panties down and froze for a second, and stopped what I was doing stunned by what I saw. Then my mom said if I stop again I had to lick her pussy instead, so I continued, but I secretly was wishing I could lick her pussy next, after a few minutes of worshiping her feet, I stopped and just looked at her, she immediately knew I was liking this, and said “get up here, you can lick mommy’s pussy baby” I stopped rubbing my penis and moved my head in between her legs, I have never been so excited in my life, I masturbated to my mom every night and fantasized about eating her out since I was 12. My mom grabbed my head and pushed my mouth against her pussy and grinded it against my face and asked if I liked mommy’s pussy, I nodded and started licking her clit making her squirm and moan and got her really close to orgasm when she pushed my head away and told me it’s time for me to be her new man and fuck her like my dad’s supposed to be doing. I didn’t pause for a second it all felt so natural and right, I pulled her legs apart and stuck my throbbing dick in my own mother, while she was begging for my cock and started fucking her fast and hard, my mom looked at me as if she was stunned that I was fucking her so hard and could not say a word at first, I didn’t stop and kept fucking her hard, as she screamed “fuck your mommy” over and over again