Originally posted by Don Smitty:
Very true but I cannot believe that Michael did not have pictures of his "older" children around the house or in his office. Vincent hung around michael he must have seen them. 
Yes, there are pictures in the office, and you will recall Kay is looking at them right before the scene where she asks Michael to let Anthony be an opera singer.
There is a line in GF III however where Mary says to Vinny that the last time they saw each other was when she was 8 years old, so even if her picture was on the wall it is likely Vinnie paid no mind to it.
