The Rage of Caliban - The Magpie Prince Cycle

Never, never ever make a witch annoyed with you. Just.don't. Painter Phoebe Starwood-Llewellyn is struggling to create an art career; she specializes in portraiture, which simply wasn't fashionable among 1960s English art critics. A young woman, and a mother, she is also a witch, part of an ever-growing tribe of demon-bred people with inherited magical abilities. She doesn't consider herself particularly skilled in magic, but a wealthy art collector tempts her with a lucrative if morally questionable challenge requiring spells her fellow witches think impossible.
Phoebe becomes determined to see if she is up to creating a version of one of the most famous pictures in English fiction: The Picture of Dorian Gray. As you may already know, there's no telling what a witch may do.