As practical and matter-of-fact as you always are, you're not the type to deliberately tease your partner or make them think you might be interested in someone else just to get a rise out of them. So seeing jealousy on their face isn't something you're used to. Now that it's there, and you're not responsible, it might actually feel like a compliment. Just don't let it go too far. It's an ugly emotion.
Your birth chart is a map of the sky at the moment you were born. Download the Sun Signs app to find out how the planets’ positions influence your life.