Most sister tend to be opposite in nature. They go their separate ways in order to find things that they enjoy. Those two have a bit of an issue with that. While one enjoys working out and making herself feel powerful and fit, her counterpart, however, is a lot more relaxed about life: Enjoying herself and her little pleasures. The trouble is it makes her sister work three times as hard to enjoy the fruit of her own labors.

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That's the kind of push me Pull you pic idea I like :) I wonder what their spine looks liek though!
Also, sorry for previous pic (the armless indian girl).... totally forgot I had already uploaded it!