Feng Jun truly didn't care about the Zhu Family Ancestor's final strike—if he couldn't defeat you, couldn't he at least dodge?
But after the burst of wrath, he found it rather dull. He initially intended to stand up for Wu Mingrui, but that guy ended up committing suicide.
Why did he commit suicide? Was it because he worried Feng Jun couldn't defeat the Zhu Family and hoped he would flee quickly?
Feng Jun felt that might be the case, but it was also possible that Wu Mingrui feared the Zhu Family would retaliate against the Wu Family after his departure.
If he wanted the Wu Family not to suffer anymore, he could only hope that Feng Jun would wipe out the entire Zhu Family, but that was his wife's clan...
No matter the logic, Wu Mingrui was ultimately dead, leaving behind a daughter.