Complex sentence: During the argument, it is revealed that Vincenzo is actually Didi's real father, and as the fight escalates, Kat pulls out a gun, points it at Johnny, and then turns it on herself.
Split into simpler sentences: During the argument, it is revealed that Vincenzo is actually Didi's real father. As the fight escalates, Kat pulls out a gun, points it at Johnny, and then turns it on herself.