A parent who is codependent with their child is likely to be very invested in their child’s outcomes. The phrase “You’re only as happy as your unhappiest child” will resonate for this parent, and their mood will often be dependent on their child’s state of mind.
A codependent parent is likely to want to ‘fix’ their child’s problems, often intervening in their lives in ways which the child may not want. For example, a codependent parent is likely to want to call their child’s doctor even after the child has become legally old enough to manage their own medical affairs.