Mercy

I am reading Mercy by Jodi Picoult. One of the main characters in the novel is Cameron McDonald, police chief of a small town in Massachusetts. One day his cousin Jamie comes to him to tell him that he has killed his wife out of mercy because she was suffering from cancer. Cameron has to make the tough decision to arrest his own cousin. Now, aiding the prosecution side, Cameron is at odds with his devoted wife Allie who is awestruck by the idea of a man being so in love with his wife that he would grant all her wishes, even death. If you were in the same situation as Jamie, would you be able to murder the person you love out of mercy?