The reversed The Star card signals a period of uncertainty and confusion, in which the vision of the ideal to be pursued may be distorted or lost. This means that while your uncle may have a vision of what he would like from his relationship, he may not be able to achieve it.
The Empress straight indicates that your uncle should consider acceptance and adjustment as added value in his relationship. The card suggests that he is unlikely to achieve all of his goals in one fell swoop, but he should commit to working hard to build something lasting.
Bottom line, the tarot reading suggests that your uncle should move forward with his new relationship. Even knowing that he won't necessarily achieve his ideal of him, he should be committed to building something solid and lasting based on mutual acceptance and adjustment.