What a wonderful story! (Oh, and I loved the layout too. :mrgreen:)
First off, I love the names of both the main characters. Melanie's been a favorite of mine since reading Gone with the Wind, and Rowan -- well, it's just very intriguing.
I really like how the lemons play in. In particular I love the anecdote to the past -- to the summer of the lemonade stand.
I especially liked how they were at cross purposes, but then ended up reconciling.
The But from now on, you’ll be my only lemon, Mels. line was lovely, and the Thank God for lemons phrase really ended the story nicely.