It is completely inappropriate. Erotic content has no place in proper literature or general consumption. It objectifies and disrespects others, and can have a negative impact on one's mental state and values. We should stay away from such materials.
Sure. Once there were two sisters. The older sister was very good at painting. She decided to teach her younger sister how to paint. They set up their easels in the garden. The younger sister was a bit clumsy at first, but with the patient guidance of the older sister, she gradually got the hang of it. They painted the beautiful flowers and the blue sky, and that day was filled with laughter and the joy of sisterly bonding.
The story might start with the sister's best friend being hypnotized during a strange eclipse. She starts acting out of character and doing things that are not normal. The sister realizes something is wrong and decides to seek help from a local wise woman. The wise woman tells her that the hypnosis is related to an ancient curse that was placed on their land long ago. To break the curse, they need to find three magical stones hidden in different parts of the village. The sister and some of her other friends then start a quest to find these stones. It's a race against time as the hypnosis on the best friend is getting stronger, and they must work together to save her.
One possible story could be that the sister's best friend discovers she has a special power to enter people's dreams. She accidentally hypnotizes the sister while trying to show off this power. In the hypnotized state, the sister reveals her deepest secrets and desires. The best friend then has to figure out how to reverse the hypnosis without causing any harm or revealing the secrets to others.
They are not common. Literature usually gravitates towards topics that have broader appeal. Hypnotized little sister stories are rather niche. While there might be some short stories or even parts of novels where hypnosis is involved, it's not a typical plot device when it comes to a little sister character. It might be more likely to find in some experimental or indie literature pieces.
A simple story could be that the sister's best friend has a magic pendant. When she touches it while looking at the sister, it hypnotizes her. The sister then starts acting like a character from a fairytale. The best friend has to use her wits and some other magical items she finds to break the spell. Maybe she has to go on a quest to find a special flower that can reverse the hypnosis.
No. Hypnotized erotic stories are not appropriate in mainstream literature as they often contain sexual content which goes against the moral and ethical standards of a general audience. Mainstream literature is expected to be accessible to a wide range of people, including minors, and such stories would be considered inappropriate for this broad readership.
Definitely not. Mothers are figures of respect and family values. Creating such erotic content involving them is unacceptable in any civilized society and can be very disturbing to others.