The gates of the capital city of the Qutb sultanate fell to the invading Vijayanagara army with little to no resistance on the part of the demoralized Qutb soldiers. They lost their king and their crown prince had already fled the Sultanate. The other nobility were clearly useless, including the half-siblings of the Crown prince.
Commander Dhruv led the charge into the capital. The guards waved their flags and surrendered even before the fight started. The Qutb commander saw the army of Vijayanagara and thought it was going to be a one-sided massacre and decided not to fight them.
Most of the big nobles were dead from the rebels. The only ones alive were some of the half-siblings of the Crown prince. All of their crimes were reported to the commanders and they were all ordered not to leave any of the half-siblings alive.