Another Toriel dialogue

I was checking out undertale stuff and vidéos and remembered some dialogue happening to me when I played it years back. But the thing is, I cannot find any trace of this happening to anyone else !

Context: my first playthrough was normal, kills and spares. I killed Toriel not knowing a thing. After that run I decided I would do genocide run then the pacifist.

First attempt to genocide was imperfect and it took a second run to do it. So what happens next was in my fourth or fifth run, I'm not sure.

At this point I was still thinking I needed to weaken Toriel before sparing her. And when I first attacked she just died in one blow and said "You must really hate me.."

Did this happen to anyone else ?