Full spoiler mode on: Tailor's telling the truth, he's not going to be in charge after the coup happens! Lucian's flirting with other women even though he's married! It's partially why he and Julian didn't get along. The other part is that Julian's parents were an arranged marriage and didn't get along at all, hence Lucian's philandering.

I'm not commenting on the mental instability bit on this page because I feel like I've beaten that dead horse enough for now.