Stepsister / Stepbrother dream meaning is explained below using 1 different source. Each interpretation is shown with its source.
Interpretation 1 — Dream Explanations - Anonymous
Dreams of a stepsister/stepbrother signify competition for mother/father love, attention, and affection. This is a venting dream where you are releasing out your fear of scarcity, a lack of love, energy, attentiveness and attractiveness.
Source: Strangest Dream Explanations • Author: Dream Explanations - Anonymous