What did I do to you?

First time I met Bertha, she was hiding behind her boyfriend, behind a chain locked door. Second time, shopping with her, her boyfriend and a co-worker, about a week before her boyfriend dies. Co-worker gets fired, now I'm next up to bat for Bertha. But, can you believe it, she hates me.
My supervisor advices I trick her into lab work, I do. Imagine my surprise when she stops going places with me. Stops leaving her apartment. While screaming obscenities at me from her window I wonder, 'does she remember she wasn't always this way?' Perhaps she does, that is why she is always so pissed. Soon she is working with a different staff.
About half past noon, months later, my line rings.
"You in your office?" It's my supervisor.
"Yeah."
"I just saw Bertha and she is looking for your blood. Lock your door?"
"Certainly will." I lock the door and take a seat at my desk, I watch out window until she storms safely past.