No, this is not normal in a typical friendship. Such behavior involves sexual activity which is inappropriate between friends. Friendships are based on platonic relationships, mutual respect, and shared interests.
This is a very personal and inappropriate situation. First, you should communicate clearly with your friend that this behavior is not acceptable in a normal friendship. It crosses boundaries. Then, you might need to take some time apart to think about whether this friendship should continue in the same way.
First, it's important to step back and assess your own feelings. Then, have an honest conversation with your friend. Explain that this behavior crosses the line of a normal friendship. You might also need to consider distancing yourself if they don't respect your boundaries.
Once upon a time, there was a little brother and a little sister. They lived in a small cottage by the woods. One day, they decided to go on an adventure in the forest. The little brother was brave and led the way, while the little sister was a bit scared but curious. As they walked deeper, they found a beautiful meadow filled with colorful flowers. They played there all day, making flower crowns for each other and chasing butterflies.
If your little sister gave you a book jacket, you can say thank you to her first. Then you can use it to protect your favorite book. It's a really nice gift from her.
The guilt you feel is normal because this is an inappropriate behavior in a friendship. Acknowledge that what happened was wrong. Try to forgive yourself as it might have been a confusing situation. And then focus on moving forward in a more positive and appropriate way in your relationships.
Once upon a time, there was a little sister who was very tall for her age. She always stood out in the crowd. One day, at school, there was a basketball competition. Despite being a girl, her tall stature made her an excellent candidate. She joined the boys' team and with her height, she could easily reach the hoop and score points. Her teammates were initially skeptical but soon realized how valuable she was. In the end, they won the competition, all thanks to the tall little sister.
I'm not sure specifically which 'little sister muscle story' you are referring to. It could be a story about a little sister's physical development related to muscles, like how she starts to exercise and build strength in a fun and family - oriented context.