Hong Jiaxin sensed Luo Yang's intention—it was nothing more than trying to convince her not to act impulsively and let him gather some information for her.
To put it bluntly, Luo Yang didn't want her to get involved personally.
He was worried she might mess up his plans.
But the matter of looking for her parents was something deeply tied to Hong Jiaxin.
She wanted to investigate personally so she could get the information firsthand.
Yet Luo Yang kept trying to change her mind.
She had reached the limit of her patience and was ready to confront him.
If Hua XiYi overheard Hong Jiaxin losing her temper, it would raise suspicion.
Once Hua XiYi guessed that Luo Yang and Hong Jiaxin were merely friends, she might then doubt Luo Yang's stated relationship with the three Gu sisters as well.
As the saying goes: one thread pulls the entire fabric.
Don't underestimate a single sentence; the consequences could be extremely severe.