CALIFORNIA FAMILY LAW
...Child Support
......Parental Obligation of Support
.........Stepparent/Putative Parent
............In General
3 Cards On This Topic:

Stepparent may be liable for child support if held self out as natural parent.

Putative parent may be liable for support of illegitimate child if he holds self out to child as child's parent and child believes him.

After C's early years, support obligation found in nature and extent of H's social relationship with C, notwithstanding biological paternity.