AURORA, Colo. — The wife of a Colorado gunman who killed three relatives in his Aurora home escaped by leaping from a second-floor window before she called cops, her sister said yesterday.

Shooter Sonny Archuleta, 33, was later killed by cops after a six-hour standoff, but not before his wife, Stephanie, dodged his bullets to run and get help.

Corinne Wurzbacher, 30, said her sister, Stephanie, told her that Archuleta was spraying the house with bullets.

Archuleta’s brother, Patricio, 34, who had a criminal record, was shot dead in a Denver parking lot Sept. 3, 2011, authorities said.