Tiny Spiders in the Outdoor Shower

I'll never know what little drama was played out in this interaction between these two very tiny spiders. One day there was just one of them. A few days later, there were two. A few days after that, back to one, and now they are both gone. The one on the left/at top is behind the web, which is why it is obscured in most of the photos.






Here the second one has breached the web! Not that I know which one of them was the first one there, really.