Steamburg Divorce & Family Law Lawyer, New York

A legal reason for obtaining either a fault divorce or a no-fault divorce. It is rarely used, however, because of the difficulty of proving both the insanity of the spouse being divorced and that the insanity is incurable.

Consensual sexual relations by a married person with someone other than his or her spouse. In many states, adultery is technically a crime, though people are rarely prosecuted for it. In states that have retained fault grounds for divorce, adultery is always sufficient grounds for a divorce. In addition, some states alter the distribution of property between divorcing spouses in cases of adultery, giving less to the 'cheating' spouse.

An arrangement by which parents who do not live together share the upbringing of a child. Joint custody can be joint legal custody (in which both parents have a say in decisions affecting the child) joint physical custody (in which the child spends a significant amount of time with both parents) or, very rarely, both.

An investigation of prospective adoptive parents to make sure they are fit to raise a child, required by all states. Common areas of inquiry include financial stability, marital stability, lifestyles and other social factors, physical and mental health and criminal history.

The formal, legal adoption of a child by a stepparent who is living with a legal parent. Most states have special provisions making stepparent adoptions relatively easy if the child's noncustodial parent gives consent, is dead or missing, or has abandoned the child.

A type of Social Security benefit available to spouses and minor or disabled children of retired or disabled workers who qualify for either retirement or disability benefits under the program's rigorous qualification guidelines.

The voluntary abandonment of one spouse by the other, without the abandoned spouse's consent. Commonly, desertion occurs when a spouse leaves the marital home for a specified length of time. Desertion is a grounds for divorce in states with fault divorce.

A legal relationship created by a court between a guardian and his ward--either a minor child or an incapacitated adult. The guardian has a legal right and duty to care for the ward. This may involve making personal decisions on his or her behalf, managing property or both. Guardianships of incapacitated adults are more typically called conservatorships .