Thanks for the further details! What a hot hot scenario. Does your wife know that you have a fetish in watching her pee (and also taking pics of it)? Would have been great if she waited for the couple of seconds to get your camera ready and let you take a pic of her pee flow. Maybe sheยดs too shy about that..? But as you stated, other people walking around also saw her; anyway, great pic, congrats!
And there seems to be another puddle in the foreground of the pic, so this parking lot is quite obviously a famous place for ppl peeing! ;-)