^ This. XD He probably hadn't thought of it as sending him to his aunt so much as sending him to the care of his brother.

Not to mention, I sorta doubt Krichevskoy even ever really found out about what happened. Laharl certainly wasn't about to tell him. (Given his father sent him away... that's another thing I like about this with the novels... it gives a VERY legit reason for Laharl to have hated his father.)