It's unnerving to realize that you've been the object of someone's jealousy. Envy is one of those “does not compute” emotions. Now this isn't to say that you're above such things. For instance, Aquarians are famously paranoid that people are talking behind their back, but envy? Why would anyone be jealous of you? Nevertheless, it does explain a rival's nasty maneuver and now that it's been revealed you need to do something. Your instinct will be to wave it away, but you can't afford to be so blasé. You must ensure it never happens again and that means taking actions that you wouldn't normally take.