I don't think the 'little sis nacked story' is well - known. There are so many stories out there, and this one doesn't seem to be among the popular or widely - spread ones. It could be a family - specific or small - group story.
There is no information available about the 'little sis nacked story' as it stands. It could be something completely unknown or a very private anecdote. If it's a story from a book or movie, you should provide more context for me to be able to answer.
The title 'little sis pussy story' is very ambiguous. It could be about a little sister's encounter with a small animal, perhaps a kitten which is sometimes called 'pussy'. Or it could be some sort of inside - story within a family or among friends where 'little sis' has an adventure or experience related to something named 'pussy' which might not be a cat at all but just a strange name for an object or situation in their private world.
Friendship can be a theme too. Even though she is a little sis, she has her own friends, either real friends from school or her imaginary friends. Stories might revolve around the adventures she has with her friends, like building a sandcastle on the beach together.
One important tip is to use positive reinforcement. For example, if you're teaching her to suck through a straw, when she does it right, give her a small treat or lots of praise. Another thing is to choose the right equipment. A straw with a soft tip might be more comfortable for her. Also, make sure the drink you use is something she likes so she'll be more motivated to learn.
Teaching a younger sister any skill should be done in a positive and appropriate way. If it's about teaching her to suck on a straw, for example, you can start by getting a colorful and easy - to - use straw. Show her how you put your lips around it gently and suck. Let her practice with a fun drink like a fruit smoothie. Encourage her and be patient as she tries to get the hang of it.
Another alternative could be a story about the bond between sisters during a difficult time, like when they help each other through an illness in the family. This kind of story emphasizes love, support and family values.