It's important to approach this situation with sensitivity and respect for the choices and relationships of others. People's personal choices and lifestyles can vary widely, and what works for one individual or family may not be suitable for another.
If your sisters have chosen to live together as a couple and they are happy with their decision, it is their right to do so. Relationships are complex and can take many forms beyond the traditional norms of society. In some cases, siblings may form a close bond and choose to live together for companionship, emotional support, and shared responsibilities, especially if they have a strong connection and a positive relationship.
It's crucial to understand that a close living arrangement between siblings doesn't necessarily imply a romantic or sexual relationship. People can share a home and life together for reasons that extend beyond a traditional couple relationship. Companionship, mutual support, financial benefits, and shared responsibilities are some of the reasons why individuals may choose to live together.
As long as their relationship is consensual, respectful, and legal according to the laws of their country, it is their personal choice. It's essential to avoid making assumptions or judgments about their relationship without understanding the context and their feelings.
If you are concerned about their well-being or have questions about their choices, it's best to communicate openly and non-judgmentally with them to gain a better understanding of their perspective and reasons for their living arrangement. Ultimately, everyone deserves respect and the freedom to live their lives in a way that makes them happy and fulfilled, as long as it doesn't harm others or break any laws.