Wasn't expecting Eva back quite yet, it was a nice surprise. Something good happening for Leanne for a change.
In fairness, Kylie didn't go to Callum looking for drugs. That's not to say that her stated reason was much better and I do blame her for the Callum situation. There was a part where she said, "Who knows what other rubbish he's given him." If Max had had cancer or something then tracking him and his family down would have been necessary, both to help find a match and out of decency to allow them to say goodbye if it came to it. But ADHD? What good would tracking Callum down actually have done?