I can remember watching older TV shows that addressed female ejaculation, like, 'Sex and the City' and 'The L Word'... (wasn't that scene so cute when Dana had squirted and was embarrassed cause she thought she'd pee'd!?) then reading about female ejaculation in Cosmo - back in the 80's when Cosmo was a good read lol... back then it was always talked about how difficult it was, and how rare it was, for women to 'squirt'. (and how few could actually do it!)
Nowadays it seems almost every girl can do it easily and it's something we should all strive for! Sex isn't a competition - Mr. Spider is a huge porno fan... talk about sexual Olympics lol!!! And in all honesty, in my many years of experience...sex is rarely like porn...watched one with him the other day with girls squirting and I had to laugh...one clip was so obviously edited...the girl was squirting every minute almost to order...it really looked like she had filled herself with water and was just pushing it out for the camera!!
I have and can squirt - I need to be very relaxed, and lots of attention down there...and I mean LOTS... I need to have a clit come first, then continue massaging quite firmly, with fingers or a good G-Spot vibe/dildo.... once you hit the right spot she'll know...and needs to let you know so you keep the pressure on the right place.
It does feel kind of, vaguely, like the need to pee, but not urgently pee...just that first vague feeling that you're gonna need to empty your bladder soon. I find that sensation goes away after a few minutes, to be replaced by a big feeling of pressure building up inside my whole body, and my vag muscles tighten to really quite a tight squeeze around whatever is inside me, the pressure thing builds and builds - like an erupting volcano I think lol...Then I usually gush quite a lot. It is a rareity if I'm completely honest... I often have small squirts...maybe one or two small pumps of liquid, that don't even build to enough pressure to leave my vag in nothing but a slow trickle.
Keep playing and experimenting - I'm sure she will get there in the end. But as long as she is happy with her orgasms - it don't really matter if she can't reach full squirt - those orgasms for me aren't nearly s intense as just a g-spot come without the squirt!
here's a few toys I highly recomend to help with squirting - the Tracey Cox glass duo I find the best...the pink one https://www.lovehoney.co.uk/product.cfm?p=17187
then this one - its a cheapy...but I find it awesome! https://www.lovehoney.co.uk/product.cfm?p=36310
This is good too - but a bit on the large side https://www.lovehoney.co.uk/product.cfm?p=36985
And these are is amazballs!! https://www.lovehoney.co.uk/product.cfm?p=39180