Don’t think Sunset hasn’t noticed you staring at her butt every time she’s facing away from you, even though you’ve resisted the temptation to slap it. She also saw into your mind and realized you have a watersports fetish. So she deliberately wets her pants while giving you a nice view of her butt. She hopes you enjoyed it - she certainly did. Of course she’ll have to stay in those wet pants until they dry, but she doesn’t mind.
 
If you don’t like the way I did the stream (it’s been a while) I could do one that just has the wetness.