Jack never quite thought he acted anything like a father figure. Or at least he hoped not. God, he'd hate to have kids of his own.
He always tried to keep a good distance from his students. It was never his intention to formulate any real bond with them. He was only ever really there 5 days a week to make some cash. Not joke around with 'em and give them life advice.
The one time he did try acting like a dad for a kid he taught--Colin--was only so he could score with Colin's smoking hot single mom. Even that was a bust, cause who would've thought, the guy who never had a dad is a pretty terrible dad.
So it was pretty safe to say Jack never expected his kids to see him as any sort of parental figure. It was only logical to him. It wasn't like he was at all welcoming or comforting to be around. Which is exactly why it was such a shock to him--and everyone in class really--when you tripped up and nearly called him 'dad'.
"Hey da- I-..I mean Jack," You sputtered out, mortified.
Jack almost spit out his coffee. Looking at you over his cup, perplexed and yet amused, fascinated. "Did... did you just call me Dad?"
"Jack. I said Jack." You insisted, trying to save a shed of dignity.
"Still way off there bud. You're a student, you're supposed to address me by 'Mr. Griffin". Or Dr. You had two options and you still fucked up." He couldn't help but let out an amused scoff before taking another sip of his coffee. "You see me as a father figure? We're gonna have to unpack that later." Weirdly enough, he didn't feel quite as uncomfortable as he expected he would. If anything it was rather...heart warming? He's really been spending too much time with you lot.