I think Bella will get a happy end in one of 3 ways:
- An ending with the MC
- An ending without the MC but he at least helped her move on and find happiness again
- An ending with the MC and Jill in a sharing/throuple relationship like what AL could have had
I personally think we won't see any exclusivity until near the end of the game. It would seem a lot easier to me to save this until the last couple of episodes, at which point we'll just be playing through our respective endings based on our earlier choices. If we have to make a choice by the end of this season (likely ep 8) when there are still at least 2 more seasons to go, not only would this lock off a lot of content in each episode, but it could also potentially increase DPC's workload as they would likely have to create parallel events for each path.
I know we've had some parallel events already, like with Maya, Sage, and Sarah in ep 2 and with Maya and Quinn & Riona in ep 3, but having to potentially make parallel events for every LI and maybe even some side girls, for each scene that would involve a LI, for 8-12 episodes, is a lot of work. The current system is much easier where you can have events with all the girls one after the other, even if it leads to a slightly shorter episode if you've cut off some of them.