Winky's presence during Crouch interrogation

[cynthiaanncoe at home.com]

No: HPFGUIDX 24834

I have always been puzzled about why JKR has Dumbledore summon Winky 
for Crouch's interrogation.  Here are Winky's lines (abbreviated):

"Say no more, Master Barty, say no more, you is getting your father 
into trouble!"

"Master Barty, Master Barty.  You isn't ought to tell them, we is 
getting in trouble. . . ."

"Why is [Jorkins] coming into my master's business?  Why isn't she 
leaving us be?"

"Master Barty, you bad boy.

"Wail of despair."

"Noooo! Master Barty, what is you saying?"

As far as I can tell, Winky is just making a lot of noise and adding 
nothing of substance.  So why did JKR include her in the scene?  
Wouldn't it have been better to just do the interrogation and be done 
with it?  Or is there some reason I'm missing that Winky needs to be 
there?  

Cindy (feeling like a house elf today)