Memory?

Most of you know that my wonderful cat of almost 14 years, Atticus, passed away on April 15. I have put up a picture of Lily and Atticus napping on Ryan when Lily was about 2 weeks old. Lily LOVED Atticus and for about a week after he was gone, she would walk around and say "Ah? Ah?" which is what she called him (calling him by name was actually the very first word she said). She would also see a picture in a book of a cat and call it "Ah." After a week or so that disappeared and she started saying "cat" instead of "Ah," so I assumed she didn't think about him anymore. A couple of days ago, Lily and I were playing in her room, and out of nowhere she suddenly said "Ah?" and looked under her crib which is where he liked to hide sometimes. Of course, she didn't see him under there so when she looked up at me, I said "what did you say Lily?" She replied "cat." Is it possible that she remembers Atticus and that he hid under there? I can't think of any other explanation of why she would have done that. I guess maybe she misses him too sometimes.