Under the Family Law Act 1975, the Court’s primary concern in any parenting matter is the best interests of the child. This is the guiding principle in decisions about who the child lives with, spends time with, and communicates with. This includes siblings and half-siblings. If the Court believes that continuing or establishing a relationship with a half-sibling is in the child’s best interests, it will often make orders to support that connection.

Sibling bonds can be incredibly important to a child’s emotional wellbeing and sense of identity. Half-siblings often grow up sharing experiences, forming close attachments, and providing stability through family changes.

When separated parents or blended families are involved, sometimes one parent may try to limit or prevent contact between a child and their half-sibling. In those cases, the Court may intervene to help maintain that relationship, especially if there is evidence that the bond is strong and beneficial.

The goal is to support ongoing connection where possible, not to create further conflict. When deciding whether to make orders about time spent with half-siblings, the Court may look at:

• Whether the children have lived together in the past
• The quality of the relationship between the siblings
• The child’s wishes, depending on their age and maturity
• The practicality of maintaining contact (e.g., distance, parenting schedules)
• Whether one parent is attempting to undermine the relationship without valid reason

Even if children haven’t had much contact, the Court may still consider introducing or encouraging a relationship if it believes doing so would benefit the child’s development and emotional security. Gradual introductions or supervised time may be part of a court-ordered plan.

Every family is different, and the outcome will depend on the facts of the case and the child’s needs. If you believe that a child is being unfairly denied contact with a half-sibling, consider:

• Trying to reach an agreement through mediation or Family Dispute Resolution
• Seeking legal advice about your options under the Family Law Act
• Applying to the Court for parenting orders that include time or contact with the sibling

While children don’t have a legal right to know their half-siblings in a strict sense, Australian family law strongly supports maintaining important family relationships, including between siblings and half-siblings. If a relationship is in the child’s best interests, the courts can and do make orders to preserve or establish that connection. If you’re concerned about sibling separation or want help navigating the system, it’s always best to seek legal advice tailored to your situation.