I've seen comments on instagram talking about what a pile of bs it is that Nick suddenly gives a damn. It's pretty darn hard for me to forget that during the time of Adam being accused of Constance's "murder" that Nick could've helped but his true colours of not caring one little bit for Adam, Chelsea or Connor were shining brightly while he refused to be of any help!
Oh definitely Nick only "cares" now to make him look like the wonderful caring "brother" (that he isn't) in Chelsea's eyes.
It might work on-screen with the dumb dumb characters but no such luck with viewers.