The Three of Wands is about a situation where you are already in a relationship, but there is some uncertainty and lack of security. The current situation can be considered stable and maybe even happy, but there is always a concern that something might go wrong. You feel the need to work on your relationships to make them stronger and more lasting.
Temperance reversed represents the need to review one's expectations regarding the relationship. Perhaps you are too optimistic or too pessimistic, but it is important that your expectations are realistic to avoid disappointment. Furthermore, one must understand how to manage the different emotions that involve both partners in the relationship.
The reversed Knight of Pentacles indicates that there may be obstacles along the way to a long-lasting and happy relationship. You may need to put pride aside and try to better understand each other's needs to overcome obstacles. Also, it is important to be patient as not all problems can be resolved immediately.
In conclusion, the tarot indicates that there may be a chance to have a happy and lasting relationship, but the road will not be easy. To be successful, the couple will have to better understand their expectations, take care of their emotions and overcome any obstacles with patience and mutual understanding.