LFS: Brother and sister go to neighbors pool

[GeTee]

This was a story I read a whole ago.

I remember a brother and sister go to a neighbors pool to swim, I think they had to skinny dip for some reason, the neighbors return home, they go and hide in some type of small pool room that makes them so cramped they are touching and it leads to accidental sex sort of? It may have been a summer lovin submission but I don't remember a ton about it and have tried every search I could think of without success.