The first card is Justice: this card represents a balance of forces at play, both internal and external. It also represents the willingness to face difficulties and to keep fighting for what you want to achieve. This indicates that in the current situation, there is some level of conflict but also a sense of purpose and potential for your relationship with your parents.
The second card is the Knight of Pentacles: this card indicates that there are obstacles to overcome. They could come from difficulties inherent in family relationships, such as selfishness, lack of communication, stubbornness, or unrealistic expectations. However, this card also suggests that if you are willing to question your opinions and learn from the people around you, then there is a chance to overcome the obstacles present in your relationship with your parents.
The last card is the reversed Three of Wands: this card suggests that you must be willing to accept the advice offered by others and act on it. It also means you can't expect things to change immediately; it will take time and effort on your part for your relationship to evolve and improve.
From the analysis of the three cards it is clear that to improve your relationship with your parents you must be ready to face the obstacles present in your current situation, be open to receiving advice from others and be committed to implementing that advice. Only in this way will you be able to build a more solid and lasting relationship with your parents.