We are fighting together! My sister and me

Here are my sister and me.

We decide to do something new every day and broadcasting here. What's something new? It should be something that we haven't tried before or something we always hope to see how it is.

Today's thing is I will try to do 50 sit-ups. Generally I could finish 30...not sure how it feel when I finish 50 such actions. Later I will post some pictures or one video that I do this.

Guess which one is me ?I am that silly one.