The "sharing" question is actually more complex than it seems. When I realized that Solvalley didn't have much left to offer, I decided to just go with what the fans wanted. I thought that the majority of fans would want solo scenes (that's why I try to keep 75% of the solo scenes in each update), but I forgot one crucial detail: the solo scenes had already been exhaustively explored during the game, unlike the sharing scenes. So what happened, in my opinion, is that when I decided to just follow fan suggestions, the majority of people who liked the solo part no longer had much interest in the project and kept quiet, while the minority who liked the sharing scenes started sending me every possible and imaginable scenario, creating this imbalance where almost all the suggestions I get from fans are for sharing scenes.
Of course, there were also solo suggestions, usually for characters who didn't appear much, like Sarah's friends (I did a group scene with them as well as an ending), Barbara the cop (I did two scenes with her), Valentina (maybe I'll do a short scene with her) and there are some more radical guys who think that Solvalley will be half-assed in terms of content as long as there isn't an ending for each of the girls in the game, something I even tried to do at one point, but I realized that it was not feasible.
Anyway, I did a poll on my Patreon and realized that 80% of the people who pay me to work on these games thought it would be better to finish Solvalley and focus on other things. That's when I realized that the potential for "solo" fans had already been exhausted, and they wanted me to move on (and that's why they weren't suggesting more scenes to me, it's not that the sharing public was the majority). I agree with them, and that's why I'm thinking that maybe the ball scene should be the last one, and I'll only come back to the game in the future to revise a few small things. But the idea of almost exhausting the "sharing" potential of the game in the same way that I almost exhausted the "solo" potential is not in my plans, even though there are still several scenarios that fans have already suggested to me.
Note: about the harem scenes, it's the part about training Aya, in the same style as training Kyra, but it's something that despite creating an idea that the harem mode is not so incomplete, it's quite redundant content, I think.
No. Only in some endings do the girls get pregnant, but that's not the focus.