Nice story, but why making mom with fake, silicon tits? That's like one of the most turn-offs, for me. Tits should (at least in fantasy) be natural, and if she's, let's say 38-45 yrs of age (and even older, today women are taking really great care of themselves), she could easily still have very nice, and natural tits. Also i think that ending should have been better, like, first she's saying "we will forget about this..." and all, and then we see another couple of images where we see that during next months her son kept fucking her, almost everywhere and anytime he had the chance. Also, another thing, the initial contact between them wasn't very realistic, with her just undressing her and sex beginning. I think it's always better and more realistic if "male" character, in this case son, is trying to seduce and convince her, even better if she's trying to resist at first, and then gives in.