I actually had both "Jill" and "Other" in the list, but when my MC rushes to the dinner to tell her he wants to be with her she basically just tells MC that she's looking for something else but that we can be friends, basically. That's why it makes me wonder if there's a recovery option later or not because like I mentioned earlier on my playthrough outside of mostly defending myself from other people, I was pretty nice to people in the game. Always did everything I could for Jill, etc. and I wouldn't start fights with people unnecessarily or be nasty to anybody unprovoked, and even had very good interactions with Jill like the picnic date, so if she's written out of it at this point over a dick pic or other minor things, I think that's exceedingly poor writing on DPC's behalf, but ultimately there are plenty of other girls my MC likes but hasn't heavily pursued, so it's not a deal breaker for me or anything, but definitely stands out as a poorly written section of the game.
Ya, you're probably in a rough spot with Sage due to Jade being her adoptive mom, but wait and see what happens - Sage is pretty cool so hopefully she'll be semi reasonable - I was actually impressed with how she handled things with Chad. I actually avoided sleeping with Jade as I was afraid it would interfere with things with Jill at some point, so I didn't even do that, lol. I may have to go back and start sleeping with Jade now that I know Jill bails over some of the silliest stuff, ever, lol.