After days of wondering what pushed Solange to start that fight with Jay Z in a hotel elevator, details have finally emerged, and it all points to the rapper's choice to attend a party Rihanna was throwing without his wife Beyonce.

According to the New York Daily News, Solange got upset with Jay for wanting to hit up Rihanna's Met Gala after-party instead of going home with Beyonce. But it wasn't just the fact that he went to the party. Apparently when Solange, who was already reportedly drunk at the Standard Hotel where the elevator fight occurred, started asking big sis Beyonce why her husband was going to a club so late, Hov quickly shot back with, "You're one to talk." This set off Solange's rage, and you saw the rest.

Tensions were reportedly running high between Jay Z and Solange prior to the infamous elevator incident. According to reports, some of Solange's friends crashed the Met Gala after-party at the Standard and tried to use Jay's name to get in. After Jay eventually heard about this, he snapped at his sister-in-law, telling her to have her friends stop using his name.

Despite the violent attack and Solange deleting photos of her big sister on Instagram, things seem to have simmered down between the singer and Jay Z, as they were spotted checking out baubles at Mr. Flawless in midtown Manhattan. While there was little talking between the two, some speculate that their jewelry shopping was just a public display to hide something deeper happening within the family.

While reps for Jay, Bey or Solange are not commenting on the matter, reports say that the latter's recent flare-up isn't anything new -- Jay Z and Beyonce are all too familiar with her outbursts.