How this aspect affects your relationship is entirely up to the two of you, and depends on various factors -- how you each normally deal with strong emotions, since this aspect intensifies them; how you each handle power, because this aspect brings control issues to the surface; how well you're able to work together, because with this aspect you could accomplish a great deal; and so on. Basically, this influence is one very potent force! And how you use the power is up to you.
For a lot of couples, this turns out to be a difficult aspect to deal with. It's likely led to battles of will, with your partner taking the authoritarian and power side, allowing themselves to be completely overtaken by all the unconscious and overwhelming feelings they experience within the relationship, and you relying on the strength of your own will to withstand the emotional storm visited upon you by your lover. This kind of pairing of irrationality and stubbornness is obviously not the best use of the power generated by this aspect, nor is it the most fun. Your sexual connection is charged up by this influence -- okay, getting more fun by the minute. But why not take it even a step further? You could work as a team, and divert all that intense energy into a project that you two work on together. After all, with this influence on your side, together you could move mountains! If you can focus on a big project or goal together, you'll achieve more than you could dream of on your own.