Yevamot 56: Kohanim and Marital Complications

When a bat Yisrael marries a kohen, is then entitled to eat terumah, and he is then excluded from being able to eat terumah - what about her? What if he dies, and they have no children? May she continue to eat terumah? Plus, the implications for her. Also, in the case of a wife of a kohen who is raped.... What happens to their marriage? Is the issue the second man (unwanted though he was)? What about the Impurity? The kohen who stays with this wife is supposed to be flogged. What does all that mean about kohanim?