Girlfriend could not Cum even though she was about to Cum.

Hi, I was fingering my Girlfriend's vulva and my Girlfriend was about to Cum. She told me that she had pissing sensation. I told her that she is about to squirt her fluid out of her vagina.But she could not squirt it out. I on my part continued to rub the inside of her vagina. Did I make a mistake of continuing the rubbing action after she mentioned that she is about to cum?..I feel because of my finger rubbing continuously, she could not reach her climax.Is that so?