Who is tom in The Great Gatsby book?

Tom wrecked into a wagon and ripped one of the front wheels off of his car. He had one of the maids of the Santa Barbara Hotel riding with him in his car. This implies that Tom was cheating on his wife, Daisy. The whole incident was written up in the paper, including the fact that the maid was riding with him. The book doesn't mention if Daisy finds out, but she most likely would have.