is this abuse?

Let me start off by saying this is my first semester in nursing school.

The other day I went into a nursing home and was sitting there doing my care plan.

A nurse went up to a resident that had broken her arm. It was now healed and she wanted to help her do some therapy. Well, she took off this black guard that was on her hand and was trying to move her hand. The lady asked her to stop several times. She then said "stop it you are hurting me". The nurse said "we have to do this" the woman started screaming stop. Finally the women screamed "i said stop! you are hurting me" another nurse heard her down the other hall and came to see what was going on. Only then did the nurse stop and tell her to move it herself. I have seen this resident in other situations and she is the sweetest thing. She doesnt scream or yell. I am confused as if this was abuse or not. She did ask her to stop several times.

I know physical therapy of previously broken bones can sometimes be painful....but these seemed mean to me. I am going to speak to my instructor on monday. Just wanted to know what you guys think.