Does she have a right to be mad?

[? All you need is ? ?]

Okay. So, i'm an "expirenced member of the dance committee," i've been on it for a year, and there is a new girl who thinks she knows everthing. So today,me and 2 other friends went back to the room to make a sketch of our wall, and we left 3 girls in there to take stapels out.2 of them (i didnt think about this) they had to leave 20 min early, so it was only that one girl. Now, I think she should ahve come back into the room, and told us that she was alone and she needed help. Instead she told the teacher we left her to do the work alone. Mr. Schnider was really nice and told us to go back in there and finsish cleaning up and let her go. So we walked back and we get in there and I say "Im going to grab a broom," and the girl Maria gives my friend Alice a dirty look as she walks by, then glares at my friend Chrissy and walks out.

Did she have a right to be mad?