How does Linda eventually gain her freedom? Why does she have mixed emotions at the end of the novel?

Linda gains her freedom when Mr. Bruce offers to buy her for $300. After Mr. Bruce bought her he immediately freed her. Linda though accepted Mr. Bruce's offer to continue on and serve them. Linda was a nurse for Mr. Bruce's second child. Linda has mixed emotions at the end of the novel for many reasons. The main reason is because her daughter Ellen left Linda to pursue a great education offered to her. At this time Linda was sad because she wanted Ellen to stay and she didn't want to loose her but on the other side she knew that she needed a proper education and that she had to go. Linda's grandmother and uncle also passed away and she wasn't able to be with them at the time. This also gave Linda mixed emotions at the end of the novel.