Chyos I found a bug.
I finished Julia's love route (as much as is available in 0.4.9) and her dad agreed to let me marry her.
love and corruption are both high with her. And NTR mode is off.
After doing so I noticed there is an option to replace the wine in her room with cumwine. I figured "hey why not, it will accelerate her corruption" (which can only be 1 point per day).
However, when I did so it instead triggered her slut route and reverted progress with her. Triggering a conversation at noon in the study a conversation between her and her dad.
The dialog between her and giron and between her and MC afterwards indicates everyone completely forgot about the fact I already did all the love route with her. As well as the fact that Giron agreed to give me her hand in marriage. In effect becoming a sequence break.
I reloaded an older save and just... didn't do that.
But I think it either needs adjusted dialog, or make it so that putting cumwine in her room does not force the slut route if you already have secured her hand in marriage.