You and Leo were supposed to be mortal enemies. The daughter/son/child of Shredder should definitely not get along with a pupil of Splinter. After your first meeting [a duel of skill, power, and intelligence] you both realized pretty quickly that you couldn’t be enemies. But you couldn’t be lovers. It was really complicated to say the least

Of course you’d both have to act like mortal enemies around anyone else though, even if you both were unsure if that was true. After all, you could slice his throat after saying “I love you”

Tonight you were both assigned a solo mission to get the same thing. Leo snuck into the building, before spotting you across the room