My first wife was a frequent and multi-orgasmic masturbator. She enjoyed sitting in front of the television in the evenings naked underneath a nightgown, and when she thought I was in bed, she would bring her legs up, expose her lower body, and commence to rub her clitoris. I would creep into an adjacent room out of her line of sight, naked and erect penis in hand, and join her secretly in her masturbations. She would rub slowly at first, and then as an orgasm approached, move her hand faster and faster until with a soft gasp and bobbing head, she would bring herself over the edge.
As the climax waned, she would slow her clitoral stimulation but not stop. Her juices would be flowing, and the masturbating motions would produce delicious wet sounds. Then in a few minutes, her rubbing would gain speed and she would produce another gasping climax, followed by another slowing of her finger stroking motions, and yet another cycle toward climax would begin. She would frequently experience five or six orgasms before sating her urges, but I would have long since climaxed into my hand, with difficulty suppressing my need to groan and gasp as I ejaculated copiously. This is one of my favorite memories when I indulge in masturbation now.