Squirting is not a foregone conclusion. Some women do and some do not. There is nothing a guy can do to "make her" do it other than to provide whatever stimulation is pleasurable to her.

The source of the solution is from the Skeens gland and other rudimentary tissue that has its origins with the male prostate. Because the solution comes out of the urethra, then of course there can be residual urine present. Also, there is not valve in the female system like there is in males.

So in your answer, yes it is part urine coming out.

The operative term is "residual". It's not unlike refilling a bottle with something other than what was originally in it without first washing it. There is often a leftover smell or taste. Unless a woman looses control so to speak then she is not urinating.

Go to Women's Health and read What we Know and Do not Know about female ejaculation.

You did not make her do anything. Some women squirt; some do not; some sometimes do. Crediting some man for what her body does is not reasonable.

i have found some articles about this issue a while ago but i forgot the site, let me try to search it on google and get back to you.