Generally child support is figured from the husband's income alone. This page is about will my husband remarrying increase my child support.
Typically child support is the responsibility of the parents. However, some states do allow the income of a stepparent to be considered in support cases. This is a page about, "Is stepparent responsible for child support?".
Child support payments are typically calculated based on the number of children and the income of the parents. This is a page about calculating child support.