Years ago (maybe 15 to 20 or more) I read an incest story that involved 2 sisters and their sons.
If I recall part of the storyline involved one of the mothers having sex with her son in their vehicle on the way to a cabin/vacation home.
They then meet up with her sister and her son.
The husband (who if I recall is an asshole) of the first women is supposed to meet them but is delayed.
Also if I recall it involved a snowstorm though I could be wrong since it's been so long since I read it.
