I fukked aunty in Day 30 without cheating. Just spam study in between Monday to Friday, BUT don't forget to study with her in the afternoon & also cook food with her at evening each day. Then Saturday & Sunday full develop relationship with her, no study. I do realize that the trigger event are bugged af. There's one time when the affection, scholar & study points so high, it's trigger 3 "upgrade" event in one week. Doing chores are not mandatory, even pointless. You develop affection quickly with her by direct interaction.