My ex-fiancee used to do this all the time when I made love to her. She could cum, and cum, and cum and soak the bedsheets. Even with three super-thick towels laid out, she would soak them clean through. It hurt like a son-of-a-gun when we broke up as she was the best that I had ever had.
When i was 17 i went out with this girl,this is back in 1988, i didn't even know that some women squirted,LOL, this was about the third time i had had sex and she told me "I'm gonna show you something and you need to get a towel" i was like huh? so she laid the towel on the bed and she told me to finger her and to not stop,then it happened,holy smokes, she squirted like 3 feet!! i thought i was seeing things, didn't help we were both drunk,man those were the best of times!!