Mable's eyes opened a moment after Edward caught on and started whistling along, but they nearly closed again with how wide her smile was.  She clapped along to the beat he was tapping on his leg, and bobbing her head.

Ah!  It really was such a pretty little song.  She hummed it for some long seconds more before stopping and clapping properly, for herself and Edward.

"How beautiful!  We make a nice little - little - what did you call it?  A twosome, or a duet?  Well, either way, how lovely!  Thank you again Edward!"

Picking up her tarts, Mable hopped off the crate she'd been sitting on and dusted herself off.  "I'm having such a wonderful day with you, what should we do next?  Maybe we could put on a performance of our song on a stage, and earn lots of money from selling tickets.  I think we'd do very well!"