For Texas Laws/Codes, this is what I found on;
http://www.ancpr.org/state_statutes.htm
Sec. 3.103. Managing Earnings of Minor
Managing Earnings of Minor;
During the marriage of the parents of an unemancipated minor for whom a managing conservator has not been appointed, the earnings of the minor are subject to the joint management, control, and disposition of the parents of the minor, unless otherwise provided by agreement of the parents or by judicial order.
If you are divorced from the other parent, and are named managning conservator of the child/ minor, then you are in contorl of the minor's earning's. If you are not, you and your Spouse jointly control the minor's earnings.