Sheila Scott’s many ways of giving

When the Stephenson children were small, they drew all over the walls of their house in Islington. “It was absolutely mad. The walls looked like Cy Twombly paintings,” says Mary Stephenson, 35, who with her twin sister, Anna, sits in the middle of the brood; they have two older sisters, Minnie, 39, and Lola, 37, and a little brother, Jimmy, 33. “The drawings were quite dense at the bottom and then, as they got higher, they got more fragmented,” she continues. “Because as we got…