A SA woman whose husband killed her two young sons in a murder-suicide has spoken publicly for the first time, saying all three of her boys are still in her heart.

Melissa Little endured heartbreak on an unimaginable scale when husband Damien Little shot dead their sons, Koda, 4, and nine-month-old Hunter before driving them off a wharf in Port Lincoln in January.

Opening up about her grief in a letter to The Advertiser , Ms Little said she still thought about her boys every single day.

“The tragic event that took place in January has left me broken hearted,” she writes.

“The loss of my children … and my husband Damien, has left me with only precious memories to hold.”

Ms Little, who was married to Mr Little - a successful footballer - for 12 years, said she had to make a conscious effort to avoid being consumed by the tragedy and to stop questioning why.

“The more I tried to understand the ‘why’ behind the tragic events, the more I realised I couldn’t have changed things,” she wrote.

“So one day at a time, I tried to find strength to rebuild my life — always having my three boys in my heart.

Since the tragedy, Ms Little has rekindled her career as an early childhood teacher.

In July, Ms Little walked Papua New Guinea’s Kododa Track in memory of her son Koda, who was named after the 96km trail.

Ms Little said she had also written a children’s book about dealing with grief.