I wanted to post "Just think, he passed a psych evaluation" but then that particular barrier has never been very strict for US reality television. Not even in the wake of murder.
Apparently those pictures aren't in the proper order due to Jokers Updates and their lust for drama.
Amber was awake at the time of this, she and Caleb had just gone to bed and said goodnight. Two nights ago, around 3:45 am on cameras 3 and 4 if you can flashback and verify.
I just watched this on FB. He appears to have stolen a kiss from Amber whilst she slept (or pretended to be sleeping), since she didn't respond with any movement at all. Creepy.