Brother/sister story

[Baseball38]

Looking for a story about a brother and sister that were exchanging texts/pics with another brother and sister, each time upping the ante. Eventually both sets of siblings were having sex. Thanks for your help

 

[Bigjoe73]

Try "SILENCE IS... SEXY" by Tyzmartar.
https://www.literotica.com/s/silence-is-sexy

 

[bluecatz123]

Looking for a story about a brother and sister that were exchanging texts/pics with another brother and sister, each time upping the ante. Eventually both sets of siblings were having sex. Thanks for your help

I believe this is it:

https://www.literotica.com/s/quarantine-flirting