No. 'Cum' is an inappropriate or at least very unclear term in this context. A proper English sentence should use more common and appropriate words. This phrase seems rather odd and not in line with standard English usage.
The title 'cum for big sister story' is rather ambiguous. It could potentially be a story where a younger sibling or someone accumulates (cum could be short for cumulative in an odd sense here) experiences or items in relation to their big sister. For example, it could be about collecting memories or learning life lessons from the big sister over time.
The phrase is really unclear. 'Sister watches' is simple enough, but 'cum story' is not a common expression. It might be some sort of very niche or even mis - worded idea. Maybe it was intended to be something else and got written wrong.
Since I don't really know what this story is exactly, it's hard to say where you can find it. It might be a self - written or very niche story that could be in someone's personal collection or on a very specific, perhaps local or family - based, storytelling platform.
Once upon a time, there was a big brother named Tom and a big sister named Lily. One day, they found a lost puppy in the park. They decided to take it home and take care of it. They fed it, bathed it, and made a little bed for it. Eventually, they found the puppy's owner through some posters they put up. The owner was very grateful, and Tom and Lily were happy that they could help.
Once upon a time, there was a sister with a big booty. She loved to dance. Every time she danced, her big booty would move in a very energetic and unique way. People were always attracted by her dancing skills and her confidence on the dance floor.
In a family, the big sister was caught stealing some money from her parents' wallet. This was a serious matter. Her parents spanked her and then sat her down to have a long talk about honesty. The big sister was ashamed of herself. She made up her mind to be an honest person from then on. She started to do small jobs around the house to earn money instead of taking it without permission.
Once upon a time, there was a little girl named Lily. She was the youngest in her family but had the heart of a big sister. One day, she found a lost kitten on the street. Instead of waiting for someone else to help, she took the kitten home. She fed it, bathed it, and made a cozy little bed for it. Her parents were amazed at how responsible she was, just like a big sister would be.
There was a big sister, Amy, and her little sister, Bella. Amy was much older and wiser. She would often help Bella with her homework. When Bella had a bad day at school because some kids were mean to her, Amy told her stories of her own similar experiences and how she overcame them. This made Bella feel better and showed the special bond between the big and little sister.