You offer this person a major, energetic push when it comes to their career! You're like a cheerleader and drill sergeant in one when it comes to motivating them; your own natural energy inspires your lover to push forward and achieve even the loftiest of ambitions, and you also inspire them with a single-minded drive of your own. Your enthusiasm and natural initiative encourages your lover to incorporate some of that drive in order to succeed professionally.
In fact, you'd make a great professional team -- as long as you're able to avoid being overly competitive with each other. If other aspects between you promote competition and jealousy, this one could underscore that, but it doesn't have to be that way. This aspect has a lot more to do with taking care of business in the public sphere than with anything private, intimate or romantic; you have to rely on other aspects between you to provide that kind of feeling. This aspect is all about professional success and getting things done. If you can team up in your efforts, your partner, especially, is even more successful than they might on their own, because you offer them such a strong, energetic push in a public or career-related sense. You encourage them to think in an enterprising, creative way; you draw out their most dynamic ideas. You promote them -- and take part in all the spoils of their success.