@proslayer99 well, we only know that his fiancee will fall in love with his half-brother, who was hidden away. It is kind of messed up, as appearance of another possible heir, who has support of grand duke's daughter, may very well lead to chaos and death. Considering Ignis has somewhat complicated relationship with his father(who supposedly prefers Letio over Ignis), this stress piling up could have caused him to become more cruel.