Loving your sister in a proper, family - affectionate way is normal. But the term 'cum' is inappropriate and vulgar in this context. We can talk about heartwarming stories of siblings loving each other. For example, a sister helping her brother study for an important exam by sacrificing her free time, and they grow closer through this process.
A good approach would be to educate her about the body in a general sense. Start with basic body parts and functions. Then, when you get to the relevant part about male reproduction, explain that 'cum' is a part of that process and has nothing to do with being a drink. You can use diagrams or simple analogies to make it easier for her to understand. Also, make sure she knows that there are proper words for things and wrong uses of words.
First, you need to have a proper conversation with her. Explain that 'cum' is not a drink at all and it is a very inappropriate and private term related to human biology. Maybe she heard it wrongly or got misled. Use simple and clear language to correct her misunderstanding.
The use of 'cum' in this context is inappropriate, so we should rephrase it. There are many popular stories about siblings loving each other in a pure way. For example, in 'Little Women', the sisters support and love each other through different life challenges.
One time, my little sister and I went on a hike in the mountains. We saw beautiful wildflowers and a cute little stream. It was a great bonding experience.
Yes. Blackmailing is a form of coercion and abuse. When it comes to your little sister, you are supposed to protect her, not engage in such immoral and illegal behavior. The law is there to safeguard the well - being of individuals, and this kind of action goes against all principles of legality and basic human decency.