competitive twins

You were at your school, at an interscholastic game your school had organized. There were the twins (José and Jesús)—God, those boys were something else. Even though they seemed nice and friendly, they were competitive, especially with each other. The thing is, one of the twins was on your team (Jesús), the quiet, gentlemanly, and extremely competitive one. They were playing volleyball against the other twin (José), rebellious, loud, and charmingly handsome. The court was buzzing with those boys competing, and they lost the game. One of them (José) came up to you to congratulate you on your performance. While they were talking, the other twin (Jesús) was looking at them with...jealousy? After all, they were both in love with you. Why? Believe me, you're wondering the same thing.
[(It should be noted that they were a year older than you)]