The first card is Il Bagatto (The Magician) reversed. It represents an energy that has not yet reached its potential. In the past, Mario didn't take advantage of his creative and intellectual abilities. He made superficial choices and didn't take into account his deep feelings.
The second card is Two of Cups. This card indicates that Mario is starting to understand himself and his feelings better. He is developing a sense of balance and internal harmony. This means that he is starting to be more aware of what he wants from a romantic relationship.
The last card is the reversed Eight of Wands. This card represents the inability to put into practice an action plan to achieve one's goals. This means that Mario may find himself stuck and unable to decide how to move in the future.
In conclusion, two possibilities emerge from the cards for your brother Mario's sentimental future: either he will be able to take an initiative and implement an action plan to achieve his goals, or he will remain blocked, unable to decide how to move. The most likely answer is therefore "I don't know".