I assume that you mean financially responsible. The fact is thatÃ¯Â¿Â½onceÃ¯Â¿Â½a child turns 18 they are legally recognizd to be an adult. At that point, a parent is no longer responsible for proving shelter, support or otherwise for their offspring.The exceptions being, if a divorce and/or custody agreement provides that a parent is requited to pay for college expenses or the like, if there is a special needs guardianship in effect for a disabled child, or there is some other sprecific legally binding ageement in effect. However, you did not indicate any of the foregoing to be the case.Ã¯Â¿Â½