No, it's just that even though she does know they still haven't gotten around to discussing that and he still has that memento of her birth mother he was supposed to give back as Ron. She might like to have that back some day.
Now they should call each other by nickname. What to do with Linden? In my language, it could be Lipka (Linden = lipa, -ka is for diminitives like Chinese A'- or Xiao, Lipek would be masculine and funny).