There's nothing to read tho (imo) and I don't even care if there was tbh, I wanted to break up with her like 10 minutes into the game but we couldn't, Then you "have to" leave, she isn't very happy with the relationship (reading between the lines) and says time apart would be good for them, now would be a good time to break up, yes it would be sudden but I don't think it wouldn't make sense. Then after being apart for a week she suggests open relationship, this would be a perfect time to break up but again we can't you are either stuck with her or in an open relationship (which usually means that she's gonna fuck other people, I know that isn't the case now but MC doesn't and we didn't until the dev told us) and btw still stuck with her.
Oh and I know that there will probably be a break up path next update but this was a perfect opportunity for it.