In-laws are relatives you gain through marriage, like your spouse's parents, siblings, and other family. It can also refer to the spouses of your own siblings. People often use it to mean the whole group.
in laws
American couples have gone to such lengths to avoid the interference of in-laws that they have to pay marriage counselors to interfere between them. Florence King
Having a baby changes the way you view your in-laws. I love it when they come to visit now. They can hold the baby and I can go out. Matthew Broderick
Marriage is like a table with four legs - the couple, the children, the parents and the in-laws. Break any of these and the marriage crashes to the floor. Siddharth Katragadda
It's better to pick a fight with your in-laws than with your neighbors. Hindi Proverb
Greet everyone cordially when you don't know who your in-laws are going to be. Madagascan Proverb
Because he killed his wife he took shelter with his in-laws. Ethiopian Proverb