I'm trying to figure out the relationship between Marcus and Valentina... She lives in his mother's house, so...sister? But then she seems almost to be in love with him, so...um?
Not his mother's house, it's a house where the women of the village live. The Pyrean society is quite sexist, as you may have noticed. And Valentina is definitely in love with Marcus, unless he's a total jerk.
Alternate view on "click to advance"...how about auto-advance...an option, so we can sit back and read the long dialog scenes without having to click at all. I can read just about at the pace of the dialog animation, so only a short pause of perhaps one second would be necessary before automatically moving along (as if I had clicked)
it makes the dev reply to you with something stupid