Sarada wanted to prove to Boruto how much more superior the Uchiha were to the other clans in the village. And despite her mother's warning not to underestimate the Uzamaki clan, she accepted Naruto and Boruto's game of "Rock Paper Fuck" - she lost 3 times. Sakura attempted to rescue her daughter but lost at the first try and decided not to push her luck any further!
"If you suck my dick, I'm not responsible for what happens next" were the last coherent words Sarada heard that night..