Can someone explain the affair between Zeus and Hera?

Zeus and Hera were husband and wife

Explanation

Zeus wanted to marry his sister, Hera. Eventually, Hera agreed, but being the goddess of marriage, she made Zeus promise to be a faithful husband. Zeus wasn't and had many affairs with other gods and mortals, and Hera got mad and tried to destroy many of them.

answer; the period of time known as the middle ages;

four sitting presidents have been assassinated while in office but the first was abraham lincoln,