Ok so I'll go into further details

So, Bellesac, and other dude were playing with a ball, and as I recall they didn't hit Florentia with the ball on purpose, the ball bounce off somewhere. While looking for the Ball bellesac, and other dude saw Florentia that she got hit with a ball, this caused Tia's nosebleed. By then, Bellesac started calling Florentia names again such as "half-blood", etc. This angered Florentia and tossed him some dirt, which made Bellesac Mad. When he was about to hit Florentia, the twins stopped him just on time. Florentia at that time was about to pass out and when the twins wanted to take revenge on Tia. Well, this is where the misunderstanding happen. As the manhwa stated, Tia said "Don't hurt Bellesac" and as you recall she was talking in her head(DONT HURT HIM BECAUSE IT IS MY JOB TO TAKE ON REVENGE FOR MYSELF(or context similar to that)). The twins misunderstood Florentia as a child whos very kindhearted and a child who does not want to retaliate. The rumors spread fast in the mansion, saying that Florentia is actually an angel since she didn't want to retaliate and acted really kind(The maids gossips a lot). Lulac(Grandfather), then of course heard of this and got really mad(Fyi, Lulacs favorite grandchild is Florentia) (I'm stopping here since the chapter stopped here)(๑•ㅂ•)و✧