Here's one.Mum Falls Off Her Pedestal by Shydave And a bunch morehttps://www.literotica.com/s/but-mom-hes-black-pt-01https://www.literotica.com/s/feeding-momhttps://www.literotica.com/s/the-basketball-team-ch-01https://www.literotica.com/s/the-basketball-team-ch-02https://www.literotica.com/s/brides-son-and-grooms-motherhttps://www.literotica.com/s/suburban-momhttps://www.literotica.com/s/pounded-by-my-sons-friend-jamalhttps://www.literotica.com/s/sons-best-friendhttps://www.literotica.com/s/latina-mom-and-the-black-bullyLiterotica has a bunch more if you search for "mom son black" with the interracial genre on. Keeps out the incest, mostly, since those would be Incest genre.