No problem! I just finished the game and Cici's vore route, happy to help! She is looking for the "hourglass" type, can be found on the transit to work and walking around the city/park areas. (I always just roll my luck with the transit morning ride)
A useful tip for any future confusion on the pictures and what she wants is if you go into your game folder to the folder path 'AI->Walk->Catgirl->drawings' you will see a list of the drawings named "what" or "where" you should be looking.
Enjoy getting that cat fat!!