Quick Write: Good for myself or good for someone I care?

I've done a lot of choices in my life. There are a lot of big choice I made, and I'd like to keep them private, as secretes. I had some small decisions to make. It wasn't exactly a choice between good for myself and good for someone I care, it was more of a good for me or bad for me decision. During expository writing, the ones that spoke Chinese that got caught by the teacher will have to read a poem at the end of the class. So my friend spoke Chinese while talking to me. She thought she said it quiet enough that the teacher won't hear her. However, our teacher was standing right behind her. However, the teacher wasn't looking this way, she only heard us, and she thought it was me that spoke Chinese. While the teacher asked me to put on the hat of Chinese, I noticed that my friend was raising her hand to tell her that she was the one that spoke Chinese. I had to chose to let her tell the teacher or I take her mistake before she confessed. Then I took the hat before she fully raised her hand. She immediately put her hand down after I start walking back to my seat, and I could tell she really didn't want to read that poem. So I chose something that was bad for me, it wasn't exactly good for her, but I guess I really don't want to blame something on someone else in front of everyone.