It's a completely unacceptable and immoral idea. Rape is a heinous crime in any context, and when it involves family members like siblings, it violates not only the law but also the fundamental values of family and human relationships.
This phrase represents a situation that is extremely disturbing and goes against all norms of a civilized society. Siblings should have a relationship based on mutual care, respect and protection, not such an abnormal and immoral one. It also highlights the importance of teaching proper values and boundaries from a young age to prevent any form of inappropriate behavior.
The very thought of'sis rapes big brother' is abhorrent. It challenges our understanding of family, consent, and basic human decency. In real - life situations, we have laws and social norms in place to protect individuals from such non - consensual and unethical acts. Moreover, in literature or media, we should also avoid promoting such immoral concepts and instead focus on positive family dynamics.