Penny Birch 
Brush Strokes [EPUB ebook] 

Amber Oakley is dominant and beautiful but just a little too beautiful for her own good. Her fellow enthusiasts almost invariably want to give her a spanking. In Brush Strokes, she attempts to resist the attentions of the firm and matronly Hannah Riley but is soon once more back over the knee. Rather than give in, she tries to resist, but only manages to get herself into even deeper trouble.