Board Thread:Show-Related Questions and Answers/@comment-25758988-20170312131741/@comment-25926288-20170312132727

The availability of the actresses and current storyline stuff is likely why you haven't seen any follow up. So, it isn't particularly odd because they simply couldn't get it into the seasons following, regardless of how much time seemed to have past. If you want to know how much time between Lily deciding to stay and find her father and now... it's pretty much 6 (Camelot) + a few weeks before 5b + a few weeks of 5b + a few weeks of 6A. So, probably 4 to 6 months.