After 10 years, she expected nothing from him. When a bouquet arrived for her, she beamed. She went home and kissed him. He had no idea why.
What I like about this is that it can be interpreted in two ways: (1) He’s an oblivious man who can’t see what the big deal is that he sent her flowers; or (2) He’s got some competition from her secret admirer!
Either way, it’s perfectly Valentiney and nicely written.