I think probably 4-5 years. If basing on the height difference, it's probably because the men in the Imperial Family are much taller than average . Right now I think Eileen's around early 20s while Cesare's mid to late 20s. Although this is just based on my opinion lol
Hold on- what’s the age gap bc I’m on ch.3 and In the flash back he looks like an adult while she looks 8 or 9…