I had some recent experience that might help.
I have often found my wife's g-spot. She usually asks me to stop after the "feeling to pee" gets too strong.
We had seen in a movie where a girl squirts. My wife insisted it was pee. One thing I noticed was that the other person put pressure above the girls pelvis, pushing back towards her vagina.
That night I rubbed her g-sport and put pressure on her pelvis. I didn't see what happened next because I was so surprised by the unusual noise she made I looked up. It was a very good noise she made
. She is not very vocal usually. My hand was soaked and she believes she ejaculated. We are eager to experiment more.
I will post if I have more luck after her mothly visitor leaves.