as a father, he HAD to shoulder some of Lise's crimes. But why did Linden take so long to punish Lise? I actually asked this in the spoiler threads but he apparently really did love her even in the first life (b*tchiness included) but compared to this life, he chose to be a ruler more than his love (not like being with Evil/immature Elise back then would be a good end. So basically, he delayed her execution for as long as he could because he did love her to some extent but ultimately chose the crown since you know, first life Lise was all evil/spoiled)