I wish there were many other stories that can match the content of MELISSA'S SECRETS. It's an epic in that genre. Everything worked so well starting from world building, characters, conversations, situations. There can't be another story that can match this epic. It's sad when you realise that. It's even more sad that it left unfinished.
You might like Bronte Follower's stories. They have a somewhat similar theme although it moves into more talk as the stories get longer and there is a focus on lesbian sex after the first few dozen chapters. Bethstarts off in the family with 5 girls and their mothers and one father. Brings in other girls (a couple of dozen) and a few new males as time goes on.