thats suppose to be a smile ? It looks like one of those forced smiles that comes off creepy cliche moment.
Well its fun and all they are flirting.. but they got people to save lol.
As for that last part. I bet the sister will show up and see him holding her little sis as if hes going to kiss her. Then she will flip out, probably punch him. its so obvious lol.
also thanks for the chapter.. its been a long long time of waiting D: