Yea it is definitely possible. You may not get the need to pee feeling at all or you may miss it if you are caught up in the orgasm or it’s build up.
As for a wet hand, that’s going to depend on where your hand and if it is in the firing line, how much fluid you produce and whether it comes out like a popped champagne cork or just a trickle or something in between.
@Mr_Kink1 yeah that sounds likes she is squirting. The distinction between squirting and gushing isn’t really all that important when it comes down to it, it is just useful to know when trying to do either for the first time. The terminology also gets mixed up a lot and different people use different words so it can be helpful just to pick it apart a little.
I do agree with her about squirting before orgasm though. Everything starts to build towards orgasm but the squirt almost acts as like a safety release valve, so I have to rebuild the orgasm