Its the rumors of the nobles to tarnish her reputation. The reason she got attacked was because the spirit went wild and attacked her husbando and she protected him but there was no connection or bond to the spirit, it just left a scar so the nobles not knowing the reason she got the scar just slandered her. Reading the first chaps will help cause after she got attacked she just wakes up and goes to her husbando
That's my point, it is never mentioned again, but they say it is a blessing. If it wasn't supposed to be important, why not just say she was injured and that's it? It's a plotpoint that sounds like something that was supposed to be something big but never mentioned again. I heard this has 6 sequels, but only some chapters of the first sequel in English so if this comes up again in those, I find it weird that they don't mention it again here.

Why are we still not talking about the spirit who marked and bonded with her?! Did we completely forget that plot point?