From ArborWiki

Parents Without Partners provides single parents and their children with an opportunity for enhancing personal growth, self-confidence and sensitivity towards others by offering an environment for support, friendship and the exchange of parenting techniques.

To be eligible for membership in PWP, a person must be the parent of one or more living children, and be single by reason of death, divorce, separation, or never married. Custody of children is not a factor.

http://www.aapwp.org