any woman that is comfortable with her own body can squirt if you try hard enough. or at least such is my experience ;)
if she gets 'soaking wet' then chances are good she can squirt...you just gotta do a little more work is all. try goin for the trifecta: take things slow! number one rule for female pleasuring, all the time, always, she'll love you for it.
but anyways. start out slow, easy fingering, then move to just oral stimulation. when she's loving the tounge, reintroduce the fingers, and go for the G and clit at the same time, alternating speeds and pressures and such. then, when she's ready to explode, throw in a little anal stimulation (so long as she enjoys that, better to know beforehand. although some girls I know didn't like anal play until this exact moment, so I dunno) if done properly, she'll have several orgasms in a row, or more likely one enormous one...the kind where she almost crushes your skull with her legs and/or falls off the bed.
