They are visiting for the summer holidays and at the speed they move they might just about get a hug when it's time to go home.
Slow burn games are fine except when you put a time limit on them.
The way I see it we are 12 ingame days in from potentially 90. Even tho dev did mention he will not be covering the full summer (skipping some days), there is plenty of content days to look forward to.
To me "slow burn" here is great, keeps me interested. Games that show all the cards are great at first, but forgotten the next day.
Adult content is starting to seep in with Mia and its quality is superb, much better than I expected. This gives us something to look forward to when sister gets her turn.
Anyway to me the biggest issue is small updates. This is understandable as there is only a small number of game supporters, but still two ingame days pass by lightning quick.
My hope is that when there are some sex scenes in, there is some cross promotion to increase supporter count which would hopefully give the the dev an option to provide more development time per month, or hire some development help, to produce more.