Although at this moment, Zhou Tian and Bella have a good relationship, and on the surface, Zhou Tian would not be an enemy to her, Bella probably wouldn't pay too much attention to this matter.
And based on Zhou Tian's estimation, after initially learning of Zhou Tian's intentions, Bella indeed was not likely to care much about his actions. In fact, when Zhou Tian had troubles, he estimated that Bella would enthusiastically offer her help. However, "one cannot sleep soundly beside a snoring sleeper," so even if Zhou Tian's relationship with Bella was extremely good, Bella's identity had already made a decision, that no matter what she did, the progression of those matters had to prioritize the interests of her clan.