The Ace of Wands represents a new beginning and recommends being proactive and taking the initiative in finding solutions. This card indicates that a change is necessary and that the current context is no longer sustainable.
The reversed Four of Wands indicates that the current situation is deadlocked, and that something needs to be done to restore the balance. The card suggests focusing on harmony and peace, rather than arguments and quarrels.
The Six of Cups shows that we are ready to let go of our negative emotions and find a way to reconcile with my sister. This card indicates that we can emerge from this situation with a greater sense of peace and harmony.
From the three chosen cards it is clear that the best solution is to try to make peace with my sister, rather than arguing further. The Six of Cups suggests a rapprochement based on listening to each other, letting go of the negative emotions associated with this situation. The card also reminds us that, although it is not easy, it is possible to reconcile in a positive way and get out of this situation with greater harmony.