Best friends (spanking story)

This is the story about Mackenzie Williams and her best friend of 14 years, Tia Brown. Mackenzie is 14 years old but according to everyone she acts like she's 4. But they find it cute. She's very sensitive mentally and physically, where as tia is the opposite. Tia is the mature one whereas Mackenzie isn't mature. Mackenzie is nothing like normal 14year olds. Mackenzie is thinner then Tia and a lot of other people. She's only 43kgs which is bad for her. But Tia is also very thin. Mackenzie likes chocolates and 4 year old kind of things and is very innocent. She doesn't know what bad words mean. And actually doesnt even know they exist. She's scared of many things which everyone finds adorable but sometimes tease her about. Onto Tia. Tia is the opposite of Mackenzie. She is mackenzies roll model, because she's confident and tall and mackenzies wants to be confident and talk considering mackenzies only 5'1 whereas Tia is 5'5. (Btw Tia just turned 16 years old she is 1 year older then mackenzie.) Find out what happens when Mackenzie and Tia's moms leave them and go together on a business trip for a year. (Tia's in charge and they had a 3 story house which is huge.)