tell-tale

As we are discussing for our inquiry log (a very troublesome assignment).
She said it, she said it loud and sounded almost convincing.
"Busy chatting with your boyfriend?"

I was amazed. She saw it already?? lol. I did not answer her question…gave her a casual smile, pretending it was just a joke. and we continue with the discussion. Luckily other members did not bother what she said.