Describe the reaction of James Harthouse after meeting Louisa after dinner. Why did Dickens call Tom a whelf

At Bounderby's mansion, Harthouse meets Louisa and he finds her very attractive but very hard to understand. She is extremely guarded and reserved and he is unsure that his ideas and his rhetorical display are impressing her the way that they have impressed everyone else. In his observations, Harthouse notices that Louisa's ungrateful younger brother, Tom, is the only person that can make her happy.

Tom is called a wolf because he preys on the good intentions of others.