I Know There’s Something Going On - You're acting like nothing's wrong, but you're clearly up to

You're acting like nothing's wrong, but you're clearly up to something.

He said he was going to work, but he was at the mall with his ex.

She said she was going to her mom's house, but she came back with a boy.

He said he was going to the store, but he came back with a pizza and a beer.