The Blonde Died Dancing – Kelley Roos (2013)

Murder in three-quarter time
She was the most luscious, blue-eyed, baby-faced blonde I had ever seen, and she was dancing with my husband. I was tempted to scratch her eyes out, but I was too happy.
Now I knew why Steve had been “working late at the office.” He was learning to dance.
His teacher was quite a dish. And from where I stood, she seemed to be enjoying the lesson much too much. So I decided to set her straight.
When Steve came out of Studio K, I went in. A Viennese waltz was playing, but the blonde was sitting this one out—on the floor with a bullet hole in her back.