an individual who is currently legally married to a child's natural or adoptive parent but has no biological or adoptive parental relationship to the child.

the spouse of your parent by a subsequent marriage

a live-in or visited adult who volunteers part-time or full-time guidance, protection, nurturance, transportation, (often), shelter, and maybe financial support, for the minor or grown biokid/s of their primary partner

an adult who (a) chooses a single parent as their primary partner, and (b) wants to - and/or is expected to - accept responsibility for co-nurturing their partner's child/ren (stepchildren) from a prior relationship

an adult who chooses to provide part-time or full-time nurturing to one or more biological or adopted kids of her or his live-in or legal partner

a person married to a man or woman who has a child

a person who is married to the biological or adoptive parent of the child who is the subject of the custody issue

The husband or wife, by a subsequent marriage, of the child's mother or father.

A spouse of a biological parent who has no legal rights or duties to the child other than those which have been voluntarily accepted.

The spouse of a child's birth parent. A stepparent may become an adoptive parent by legally adopting the child.