Aaron smiled as J ran off with Penelope, he gave a slight nod in acknowledgement to the silent thanks. Even once the girls vanished from sight the smile still clung to his face, those two were quite a cute scene. 
'Oh well, another bag of things to carry' he thought to himself as he followed behind. 

Aaron would gladly follow the girls around and assist them up until they take Penelope to her room, that's when he will split and head to his own to sort some things out. He remains generally playful and polite if not a little cheeky.