Originally, he wanted to find a more suitable opportunity to let her know so that it would be easier for her to accept.
This... was probably the worst way for her to find out.
He got careless. He did not notice her standing right behind him. But... he did not mention his identity during the conversation with Caleb, yet she immediately called out his name.
That meant... she already knew who he was before she overheard his conversation? Who told her?
Jackson snapped open his eyes and instructe