I have a couple predictions as well, I’m sure I will be wrong but it’s fun to imagine the next episodes because we are forced to wait! I hate waiting, I’m used to buying a season of a show and watching it whenever, this is all new for me! Also I’m pregnant so I have tons of hormones going crazy and I’ll I want is some Sam& Andy action please!!
Ok so I think the Sam & Andy hook up obviously takes place in Episode 7:
"Hot & Bothered" -- A severe heat wave wreaks havoc on the city, making life on the streets even more perilous for the new members of the squad. The danger multiplies with the discovery that a serial rapist may be on the loose. Amid the chaos, Andy is cut off from her backup during a sudden citywide blackout and is challenged with taking down a vicious predator -- alone. Meanwhile, Andy also makes an unexpected romantic decision that's certain to complicate her life on and off the job.
I can imagine them agreeing to keep it a secret and also lying to themselves and saying it won’t happen again. Basically because of their jobs and working together as partners, also because Andy has MAJOR intimacy and trust issues. I also think Sam takes it a bit personal and thinks perhaps she still has
feelings for Luke, hence episode 8: “Honor Roll” things get up close and very personal as Luke and Sam compete during a retraining exercise.
I think this is where the scene happens when Andy & Sam are talking and he says “It was what is was” and she looks upset or shocked, because he didn’t want to admit his jealousy and she was shocked by it. I think the little smile/shocking face she gives is because she secretly likes that fact that he was jealous and Sam and Luke has a bit of a tussle over her.
Just some thoughts, but I can’t wait to see the hook up! I just don’t see it happening this week unfortunately.
once they pull up to her place she asks him to come up for some "coffee" lol of course if it takes place at Sam's house my theory is out of the window 
