Is it Actually a Good Idea to tell Pearl the Truth?

Earlier in the novel we see that Helen has put an ultimatum out on Winnie tell people the truth or I will tell them my self. Now ten chapters in Winnie's story has shown the true extent of the struggle and the hardships Winnie had to go through. While Pearl will now probably respect her more now the biggest truth has not been dropped yet: Wen Fu is Pearl's father. This information will turn Pearl's world upside down and make her re-think her whole life. In Pearl's current state of sickness this information would just cause her more stress and expedite the process of her disease. Also, I think Pearl will be angry with Winnie because this truth has been hidden for so long. Now this is a tricky situation because Winnie should probably tell the truth but so much time has passed keeping it to herself might be for the greater good.  I think that Winnie could tell most of the truth and be just fine but that single fact that Wen Fu is the father might be a little to much for Pearl at the moment. Even though this is an inconvenient truth if Helen was already going to tell what actually happened it would be better for Pearl to hear it from her mother rather than her aunt. So in conclusion while telling this to Pearl is probably Earth shattering it would be better for Pearl to hear it from Winnie rather than Helen.