"I don't trust humans. This one that caught me seems to be nice, but foolish." Smaug replied in his mind. The part that Smaug wouldn't tell Titania was that he remembers his mom was held by a poacher. She distracted the poacher so he could get away. He heard a loud crack, followed by his mother roaring in pain, followed by a thud. Since that he had encountered four cruel humans. He than decided to set up a home here and tried to keep himself from being hurt.