Dreaming about shopping for a saree and heels with your mother and stepmother can carry various meanings. Here are some possible interpretations:

1. Family Relationships: The presence of both your mother and stepmother may symbolize your feelings about family dynamics. It could indicate a desire for harmony or acceptance among different family members.
2. Celebration and Joy: The happiness you experienced in the dream suggests that you may be looking forward to a celebration or an event, such as your stepmother's brother's wedding. This could reflect your excitement about family gatherings or social events.
3. Identity and Tradition: The saree is often associated with cultural identity and tradition. This could symbolize your connection to your roots or your desire to embrace your cultural heritage, especially in the context of a family wedding.
4. New Beginnings: Buying new clothes like a saree and heels can symbolize new beginnings or changes in your life. It might reflect your readiness to step into new roles or experiences, especially in the context of family events.

Consider how these themes resonate with your current life situation. If you feel any unresolved feelings about your family relationships or upcoming events, this dream could be prompting you to explore those emotions further.