co-parent vs ma-in-law

co-parent

• A divorced or separated parent who shares custody with the other parent. 

• A godparent. 

• A parent in a same-sex couple. 

• Someone who shares in the parenting of a child or children, such as 

• To act as a co-parent; to share custody of a child or children; to share in the responsibility of parenting a child or children. 

ma-in-law

• mother-in-law