If you re-read the chapter you can see the Message what Kishimoto was giving through the chapter about what makes a true parent through the conversation with Sakura and Shin about genes, it was foreshadowing sarada's life. anyways Kishimoto was giving clues from day one that Sarada's mother was sakura lol re-read the entire Gaiden and stop denying the facts that were even handed to us before yesterdays chapter. even in the new chapter itself Kishimoto wrote" The truth is a cruel thing". you honestly believe all this build up is just a troll and Kishimoto wasted this entire chapter? just so that in the end Sarada was wrong and her Mom was Sakura all along?? come on man stop being stubborn.
Show me Manga scans please

oh right LOL Sakura was the Nanny LOL you're so salty. i bet even when Sasuke and karin come clean you will still be in denial LOLOL
Karin's umbilical cord
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Salty without a doubt lol
If you resort to basic internet terms like "salty" that aren't even original in a small debate it tells a lot about your mental age.
Just to sum it up, until the Gaiden is over and there is confirmation that Karin is actually Sarada mother no one with half a brain is buying into it and note that Suigetsu
"Thinks/Believes" (as stated in different translations) that what is inside the box is from Karin but Karin village was burn when she was born and when Oro found her she was about 10 years old, so it is really strange if she had her umbilical chord, EVEN if it is common in Japanese culture to keep it.
On another note, Sasuke kept rejecting Karin since he met her, really.. just sum 1+1 and remember that Kishimoto is a troll.
In fact i see a few options here..
1)Sasuke never got to funky terms with Karin but eventually Sarada is some sort of lab production using Karin genes.
2)She is in fact Karin daughter and it is ok for me BUT until the gaiden is over with real confirmation about this fact i'm not buying it totally.
3)She is Sasusaku offspring.
4)This is all mounted by Orochimaru and Sarada was a victim of deception by Suigetsu in order for the Sharingan to evolve.
No denial here, or being stubborn, just a way to see things really.