Think there were at least two more pages blank with old memories, so quite sure there will be more off those. I do hope we get with her in her current version before that though, unless dev has a mean twist there is no real reason to draw happenings with Mom out for a long time and make those a slow burn. If he thinks he needs that he has the older half sis and younger sis for those.

If drags out with Mom it will be because she is not available for whatever reason likely in game.
Update will likely take some time, this dev does make quality work and is not the fastest or most communicative so I would not be surprised he is kinda busy in real life.