Incorrect Technique — You may not be giving her the stimulation she needs to squirt.
This may be the closest she can get to squirting or she may squirt so much that neither of you even notices!
Make Her Squirt Effortlessly: Extreme Female Ejaculation Made Easy
Then you need to start using your entire arm to provide pressure to her G Spot, a lot more pressure than previously.
The remedy here is to talk to her and experiment with different techniques to find out what she needs.
Description: Learning how to make your girl squirt can be a tricky proposition. Could it apply to most women…says G spot and clitoral stimulation at the same time distracts her.