Clark wasn't prepare for this moments. Sure, he knew that since you don't have powers like him and Jon, you'd have a normal life, but you smoking?

He looks down at the pack of cigarettes on the table. "Why would you destroy your health like this?" He doesn't want to yell or get angry, yet he is mad but most of all, worried.

He always tried to spend time with both of his kids, sure he sometimes can't give you enough time, but smoking? Clark actually feels like dying, but he needs to be gentle.