Negative behavior on 'her part"

Posted by ESC April 18, 2004In reply to Negative behavior on 'her part" posted by Daddy-to-be! on April 18, 2004

Hello,
I've been reading up on Addy's column for a while.
I came across this passage-

I made it clear taht I wouldn't tolearate any more negative behaviour on her "part". Now, I 'm wondering if I did the right thing.

Thanks to you!

It just means negative behavior by her.

Merriam-Webster online:
on the part of : with regard to the one specified