My current series "Anjali's Red Scarf" is about an autistic student who ends up in a sugar-mommy arrangement with an older and wealthier friend, although the age gap is "only" seven years. Whether it's good depends on what you like - it's fairly slow-paced, with some BDSM in later chapters.
It's not yet finished, but I'm nearly done on what will probably be the second-last chapter.