Since they didn't spend too much time on the family reward visit, I would speculate none of those would win.Here's how I think it plays out:
F7: Keith gets voted out.
Final 3 pact: Jeremy, Spencer, & Tasha
All girl alliance: Kelley, Abi, & Kimmi (to their eyes, Tasha)
F6:
Spencer wins immunity.
Jeremey uses his hidden idol.
Abi or Kimmi idoled out.
F5: Abi or Kimmi idoled out by Kelley's hidden idol.
F4: Spencer wins immunity, but Jeremy & Tasha vote out Kelley.
At least that's what I think..