I should buy two tickets for her concert?--meaning: After what she did to me?
I should buy two tickets for her concert?--meaning: What, you're giving me a lesson in ethics?
I should buy two tickets for her concert?--meaning: I wouldn't go even if she were giving out free passes!
I should buy two tickets for her concert?--meaning: I'm having enough trouble deciding whether it's worth one.
I should buy two tickets for her concert?--meaning: She should be giving out free passes, or the hall will be empty.
I should buy two tickets for her concert?--meaning: Did she buy tickets to our daughter's recital?
I should buy two tickets for her concert?--meaning: You mean, they call what she does a "concert"?