No way. This kind of description goes against the principles of respecting the vulnerable and the values of decency. Society should protect the innocence of children and family members, and not allow any form of sexualization in relation to them.
Yes, there are many. For example, stories about a babysitter sister who helps the kids with their homework, plays educational games with them, and takes them on adventures in the park. These stories focus on the positive and nurturing aspects of babysitting.
No, it is not appropriate at all. Incestuous themes are considered unethical and not acceptable in most societies. Such content is also against moral and family values.
There was a kid sister named Lily. One evening, it was time for her bath. Her big brother helped her prepare the bath. He put some of her favorite toys in the tub. Lily got in the bath and started playing with the toys. She made a big splash and laughed. As she washed her little feet, she told her brother about her day at school. It was a warm and cozy bath time filled with joy and chatter.
Well, there could be toys. For example, like a floating boat. The little sister might sail the boat in the bath water and pretend she's on a big adventure.
You could focus on heartwarming stories of a stepmom and stepchild sharing a bathroom renovation project, with all the fun and challenges that come with it.
A kid sister bath story can have the type of soap she uses. If it's a special - scented one like lavender or lemon. Her actions during the bath are important too. She might be singing a song while scrubbing her knees. And interactions with others, like when her dad tells her a joke while she's in the tub. All these elements can make the story interesting and engaging.