I'm a Braxton

My name's Jessica Braxton. I'm 17 and lived with my mom in Melbourne until she passed away a month ago. Before she died, she handed me a letter that's about to turn my whole world upside down.
"Dear Jessie,
I regret not telling you sooner, but you have siblings living in Summer Bay. Their names are Brax, Heath, Kyle, and Casey. They are your half-brothers, except for Casey, who is also my son. Your father took him away, and I couldn't stop it. Although this is not how I wanted to share it with you. There's one thing I ask of you: please go to Summer Bay and let your brothers know about you."