I'm guessing he's accepted a plea and he views this as (relative) freedom to behave however he wants again.
I know nothing about the law and how or if a plea can get rescinded, but I'd bet Nick will do everything he can to thinly skirt that line, until his confidence overflows again and he crosses some other boundaries. And I bet what he wants to do most is taunt Aaron, and get Aaron to slip legally.
He has learned nothing but more ideas to game the system. What a disgusting piece of shit; his poor, poor children. He will use them as pawns as long as he can; this is a man that deliberately financed paedophile because he's bitter about his ex-boyfriend.