Series where neighbor couples swap and make porn

[Splash_bros]

I read the first story of a series where 2 neighbor couples lose their jobs due to the financial crisis of 2008. They are good friends and are supporting each other. While hanging out in a hot tub, they end up swapping. They decide they can produce porn with themselves as the actors

The wives are bisexual and also have sex with each other. Later in the series, one woman's brother and his wife also get involved, I think

I'd love to give the series another try. Appreciate any help.

 

[Splash_bros]

I've been searching some more and still haven't found anything. Does anybody know who might have written such a story?