Emphatically agree on both counts here. Not sure what genetics Jenny has, but wasn't interested at all.
I personally was working under the assumption that if you permanently friendzone an LI (there's a variable to track for each LI) the bicurious would mean they may look at others in the house. I didn't actually dig into the code to see if that has any impact so it's entirely my speculation.
On several playthroughs where I closed off both Amrit and Ines, and they were flagged as permanent friendzone, the MC commented a few times on some scenes about how close they were getting to each other. Again, I didn't look at the code, seems like something that would "naturally" develop if the MC said there was no interest, and they were curious. Since they are essentially non-lewdable characters in the game at that point. If that makes sense?