save_my_known_father_effect

save_my_known_father_effect = {
	if = {
		limit = {
			exists = this.father
			NOT = {
				any_known_secret = {
					secret_target = prev
					OR = {
						secret_type = secret_disputed_heritage
						secret_type = secret_unmarried_illegitimate_child
					}
				}
			}
		}
		scope:father = { save_scope_as = known_father }
	}
	else_if = {
		limit = {
			exists = this.real_father
			any_known_secret = {
				secret_target = prev
				OR = {
					secret_type = secret_disputed_heritage
					secret_type = secret_unmarried_illegitimate_child
				}
			}
		}
		scope:real_father = { save_scope_as = known_father }
	}
}

As written in game/common/scripted_effects/00_secret_effects.txt.