Why hiding the truth again from sarna family??

I know Twinkle is immature but leela she is very mature character , what is the reason of hiding truth that UV cheated them and he is donor??? Especially kunj had right to know l?? What will happen when Luthras will tell Sarnas again kunj will feel cheated and truly speaking he is, if she is not speaking , even without talking to her she is goona bail out Yuvi!!! I mean What ??? In our real life nothing happens like this!! We talk to our family our spouse about each and everything!! We are concerned too but don't act foolishly !! Marriage mean marriage we can not break it for blood !!!
I am alpha thalesimic it kind of Anemia too, but my Docter never told me don't take stress , stress doesn't effect it!! And Twinkle said Docter said kunj ko stress mat dena, lol!!!
Twinkle ko Kya laga ki UV ki bail kunj ko stress nahi degi n uv ghar aakar kunj ko stress nahi Dega!!
Marriage toh door ki baat hai kunj ko uv ka blood Mila Vahi digest nahi ho raha , aisa cheap blood !!! Yukk !!!
What Twinkle will do??? Again will cry ! N say ek baar meri baat sun lo!! Please !! Last time last chance bhi le liya ab next Kya ???? 😆

i also dont wht is the reason why they dont to family