"Spring Riding in a Carriage"

If I were to describe the relationship in 1 word, I think its realization. The couple was always caught up in their own feelings which resulted in them arguing and fighting with each other. Both were unsure of how things will turn out, so the protagonist was more realistic thinking about work, her health, medical cost, her appetite, food, medicine and anything to make her feeling better or get well. Whereas the wife was more thinking about herself, wanting more attention and putting her misery on somebody else (her husband). The relationship was unhealthy and toxic, resulting to mental and physical fatigue on both parties. After the husband heard from the doctor that the illness cannot be cured, it brought realization to the situation. From that moment on, it wasn't about fighting between the couple anymore but rather appreciation for each other. The husband puts down his work and focuses more on his wife and the time left with her, while the wife puts down her misery and became mindful of her husband. Their relationship became very beautiful like a blooming flower, its as if their relationship reset. The flowers that the husband brought at the end was as if the relationship went back in time to went they started dating, it was really warm and lovey dovey.

Question: Near the end, the protagonist said the flowers "came riding here in a carriage", what does he mean by this? it sounds very fairy-tale like just like the title "Spring Riding in a Carriage"