Am I hearing wedding bells?

During Grace's party, Frederick and Fiona have a moment to chat.

"Well Cuz, are those wedding bells I hear in the air?" Frederick asks.

Fiona responds with a confused, "What are you talking about?"

"Come on, you didn't notice the looks Grace and Tyson were giving each other? He's always been the first to volunteer whenever I needed to bring work home. At first I just thought it was the helicopter ride, but now I know the real reason. Grace."

"Grace and Tyson? I never noticed."