Andy's newfound mortality means that she gets sick now. The flu, or a stomach bug, or something - not something super serious please. (Although, if you want to have some of the others worry disproportionately that's ok, I mean the last time Nicky or Joe got sick having a fever was potentially a lot more serious than it is today?)

The rest of the family take care of her, although Andy is somewhat resistent to their caretaking at first. They all have their own little ways to entice her to let them care for her though.

(Like, Nile knows the right meds to take, Nicky makes her soup, Joe brings her a new blanket and reads a book out loud for her... or whatever filler wants, the point is that they all have their own little things they do for Andy.)