potential high school drama

So I've been able to piece together a love triangle among my students that they haven't figured out yet. It's rather amusing, I dare say. This one boy in my 4th block is dating a girl in my 3rd block. He walks her to class almost every day and even told me, "Hey, Ms. E., you know she's my girlfriend, right? Let me know if she gives you any trouble!" Ha. Anyway, he's been all flirty with another girl in his own class, and she has done the whole writing her first name with his last name thing all over her papers. I have no clue if either girl knows about the other, but I'm just going to take a step back and watch it unfold. The end.