Three episodes to go.
My thoughts so far...
At this point I don’t think a spoiler is necessary, but I can change it if I necessary.
The dad, Matt, raped and impregnated Tui.
Tui is alive. Either Holly Hunter and her gals have her stashed, or Tui and her friends have a secret hideaway, which is why they are secretly boating onto the lake; they are taking her supplies.
The sheriff, Al, is corrupt. IIRC, he was paid off (I believe it was cocaine) by Matt when he and his sons killed the guy in the beginning. Al is getting a kickback from Matt’s drug operation. That home of Al’s is way too nice for someone on a sheriff’s salary. A doctor or attorney could be living there, but not a sheriff.
Robin may end up killing somebody, possibly Matt. If Matt is guilty, I can’t see him going down without a fight.