I mean the step mom things wasn't such a bad idea

I disagree. It is cute yes but let's remember a few things.
1. Caitel is violent and crazy.
2. Caitel refuses to accept anyone that might be plotting to take the throne. Remember her supposed half brother incident?

Yeah... Remember what happened to the MC's mother... Or her half siblings.... And their mothers... I think he's had plenty of chances with relationships. (-_-;)