'Father in law' in the Bible

And it was told to Tamar, saying, Behold, thy father-in-law goeth up to Timnath, to shear his sheep.

When she was brought forth, she sent to her father-in-law, saying, By the man whose these are, am I with child: and she said, Discern, I pray thee, whose are these, the signet, and bracelets, and staff.