No. Stories involving inappropriate or unethical behavior towards family members are not appropriate at all. Such topics violate moral and ethical norms and can be very disturbing.
This is a very embarrassing situation. First of all, you should immediately stop what you're doing. Then, you might need to sincerely apologize to her for making her uncomfortable. Try to keep your distance from her for a while to let the awkwardness subside.
The phrase 'caught jerking to neighbor sex stories' is highly inappropriate. 'Caught' indicates being seen or found out. 'Jerking' is a term with sexual connotations. And basing it on 'neighbor sex stories' is not only disrespectful to neighbors but also goes against moral and ethical norms. It's better to avoid using such phrases in any context.
No, it is not appropriate at all. Such topics involve highly private and inappropriate family situations that are not suitable for public discussion. It also goes against ethical and moral norms.
It's not okay at all. We should respect everyone's privacy. Sexual stories are very private and personal. In the case of a sister, it's a family relationship that should be protected. Spreading such stories violates basic moral and ethical norms, and can lead to family breakdown and emotional harm to many people.
If you catch your little brother jerking off, it's an extremely awkward situation. First, try not to overreact. You could simply leave the area quietly to give him some privacy. Then, later on, you might consider having a general talk about privacy in the house without specifically mentioning the incident. For example, you could say that everyone needs their own private time and space.
This is an extremely embarrassing situation. First, you should immediately stop what you're doing. Then, try to apologize sincerely for making her uncomfortable. Avoid making excuses. It might also be a good idea to keep your distance from her for a while to let the awkwardness subside.
This is a very personal and complex situation. If your sister caught you in such a situation, the first step is to communicate openly with her. Let her know your feelings and that you are still the same person she knew before. For example, you could say 'Sis, I know this is a shock, but this is a part of who I am.'