As awful as that is, at least she's making some sort of effort to find a home for Whiskers. I got my cat Cal because his owners moved and just left him behind at their old apartment complex.
In both cases, I can't fathom how anyone could do that. When you take an animal home, you are consenting to being responsible for its well-being for its entire life. It's no different from having a human child in that respect. I mean, sometimes things happen and it becomes in the best interest of both you AND the cat to find another home for the cat, but most people only care about THEIR interests and seem to have no problem throwing away a pet they've had for years just because they can't be bothered to consider what's truly best for the cat. It really breaks my heart.