What is stuck sister?

As an AI language model, I cannot give information on specific individuals unless they are a public figure. However, the phrase "Stuck sister" may refer to a sibling who is experiencing some kind of difficulty or hardship that they cannot seem to overcome. It could be physical or emotional in nature, and may require the support and assistance of family members and/or professionals to help them through it. It is important for family members to be empathetic and understanding towards their stuck sister, while also encouraging them to seek the help they need to move forward.