Um, yes it is. Levirate marriage is pretty simple; if a woman dies childless, her husband's brother is obligated to marry her so that she has a chance of bearing children, even if the brother is already married.
And for some entertaining context, go read the rest of Deuteronomy 25:5, where it says how the brother should be punished if he refuses the marriage.
> "Every instance of polygamy has a bad ending in the Bible."
This is simply not true. Tell me where Lamech's or Rehoboam's marriages caused a bad ending. And as I said above, King David -- perhaps the most famous of polygamists -- is never rebuked for his marriages. The Bible makes a very clear point of rebuking him only for his adultery:
David did what was right in the eyes of the Lord, and had not turned aside from anything that He commanded him all the days of his life, except in the matter of Uriah the Hittite. 1 Kings 15:5
And for some entertaining context, go read the rest of Deuteronomy 25:5, where it says how the brother should be punished if he refuses the marriage.
> "Every instance of polygamy has a bad ending in the Bible."
This is simply not true. Tell me where Lamech's or Rehoboam's marriages caused a bad ending. And as I said above, King David -- perhaps the most famous of polygamists -- is never rebuked for his marriages. The Bible makes a very clear point of rebuking him only for his adultery:
David did what was right in the eyes of the Lord, and had not turned aside from anything that He commanded him all the days of his life, except in the matter of Uriah the Hittite. 1 Kings 15:5