Stoick and Valka's Relationship

"You're as beautiful as the day I lost you."

- Stoick to Valka

Stoick and Valka's relationship was for abandoning their family and living among dragons.

How to Train Your Dragon 2
Stoick and Valka fell in love while fighting the Berserker Tribe, lead by Oswald. After the battle, the two started dating and sang songs together.

Stoick and Valka got married and had a son called Hiccup. When Hiccup was young, Valka was grabbed by a dragon, leading Stoick to believe she had been killed. In reality, she was taken to a dragon sanctuary and learned to live in peace with dragons. Despite loving her husband and son, Valka did not return to Berk as she felt Stoick could never change his opinion on dragons.

After Valka's supposed death, Stoick told a young Hiccup that he was not intending to find a new wife as he loved Valka.

Twenty years after Hiccup's birth, five years after the Vikings had made peace with dragons, Stoick and Valka reunited. Valka expected Stoick to be angry for her not returning home, but instead, he was overjoyed to see his wife alive, and the two shared a kiss. Their time together was short, however, as Stoick was killed. Valka was very saddened by his death.

Trivia

 * In the book, Valka (Hiccup's mother) is always out on journeys and adventures, but she comes home eventually.
 * In the books, she first had a relationship with Humongously Hotshot the Hero before she gave up on him and married Stoick