Thank you for the detailed answer! Having almost three decades of gaming experience, I rarely write comments at all and do it only in those rare cases when new projects are worth it. I guess this is just the case.
Games from small development teams often have the sincerity and spontaneity that the big gaming industry has long lost in trying to reach an ever-larger audience (and correspondingly more profit). Returning to the topic of relationships, another problem is the unsatisfactory state of many games for an adult audience with sufficient life experience. Watching the relationship of brother and sister Forster in your game is already an obvious pleasure. Therefore, I hope to see many more equally natural interactions of characters parallel to the main plot.
So you can take my comments as a compliment, mostly with a hint of some constructive criticism (which may not be useful because your plans are not yet obvious).