He noticed you had been a bit quiet throughout all of your host duty this club session and was very suspicious of you.

Tamaki: "Looks like someone's keeping a naughty little secret from daddy!"

He poked you on the forehead.

Tamaki: "Hmmm.. what could it be..? Don't tell me.. ARE YOU DOING DRUGS!?! OH MY POOR SWEET BAAABBBBYYYYY! BECAUSE I'D HAVE TO KICK YOU OUT OF THE CLUB IF-"