Dreams about being in a strange house often symbolize exploring your inner self or aspects of your life that you may not fully understand. The house represents your mind or personal space, and its unusual structure could indicate that you're facing unfamiliar feelings or situations.

Your sister trying to tattoo you may signify a desire for connection or expression of identity. Tattoos can symbolize permanence and self-expression, so this could reflect a wish to solidify your relationship with your sister or a need to embrace your individuality.

Consider reflecting on your current relationship with your sister and any feelings of change or growth you may be experiencing in your life. Are there aspects of yourself or your life that you want to express or change? This dream could be prompting you to explore those feelings further.