Accept that their child is an adult with agency and autonomy and make an effort to trust and respect their decisions.
Engage in open and respectful communication with their child and make an effort to understand their perspective.
Shift focus from controlling thoughts to supportive thoughts, such as wishing their child happiness and success.
Consider seeking support from a therapist or support group, which can help them manage their emotions and develop healthier coping mechanisms.
Remember that letting go of control can be a difficult process, but it can lead to a more positive and fulfilling relationship with their adult child.