Chloe doesn't seem too concerned about what's going on, so it can't be too serious anymore. But, Lucifer does look like he's trying to explain himself away.
Lucifer can be so funny, sometimes. He looks like he's had about enough of Chloe's chastising and is just walking away. Chloe must be wondering to herself how she ended up with two kids!
Of course Lucifer is involved in this somehow. He's probably the one who did that to the doll, so why is Chloe interrogating Trixie. Chloe should know better!
What is that? One of Lucifer's playthings? Whoever did that to that doll is sure to be in a lot of trouble. There's no way Trixie could have done that, could she?
Lucifer: Once upon a time, a boy met a girl. They fell in love. They had sex. The only trouble was they were celestial beings and that moment created the universe. Dr. Martin: The Big Bang? Lucifer: Never knew how appropriate the name was until now, did ya?