Ok so I went throught two playthroughs
First where I had Layla as my main
Second where she's just a friend.
It got to the Truth or Dare on the second one, of course Layla didn't offer but then so didn't Val. I made all the same choices, barring I actually picked Val more during the Swimsuit rating bit, and I was trying to figure out why. Then it hit me, she's competing with Layla for your attention on the other route. If you aren't with Layla, I don't actually think you get as many points with her.