No idea, my mom talks about how much of a party girl she was before I was born but she became entirely celibate once I was around.
She's open about simply not having those feelings anymore after she gave birth and I don't have any other siblings. Whether it's trauma or not, I do love my mom and she's also physically extremely attractive. She's a yoga teacher and has stayed in great shape, her ass and legs in particular are amazing.
I almost can't bust a nut without thinking about stuffing my face in my mom's ass or cumming buckets inside her.