No way. It is inappropriate to even consider family in relation to such a private and often taboo topic. We should focus on positive family interactions, like sharing happy memories, supporting each other in life goals, and promoting healthy family values instead.
Another great family story is about a family who decided to plant a big garden in their backyard. Each family member took care of a part of it. They grew all kinds of vegetables and flowers. In the process, they learned about nature, patience, and they had a great time enjoying the fruits (and vegetables) of their labor together as a family.
No. It is not appropriate at all. Fanfiction should uphold certain moral and ethical standards, and any form related to inappropriate sexual content like this is unacceptable.
I'm not sure there is a proper or common 'sakura masturbation fanfiction' as this might be a rather inappropriate and not widely recognized or appropriate form of fan - created work. Fanfiction usually focuses on positive and creative interpretations of existing stories or characters in a more respectful way.
Educate family members about appropriate topics from a young age. Teach them about privacy, respect, and positive family values so that they grow up knowing what is acceptable to talk about.
We should focus on positive, healthy and appropriate topics such as hobbies, study and friendship, rather than this kind of private and improper content.
Rather than discussing this kind of private sexual experience, we can talk about things like first achievements in sports, first time traveling alone, etc. which are more suitable for sharing.