In the latest twist of the David Petraeus sex scandal, court records show the former CIA director and Gen. John Allen intervened last September in a messy custody dispute on behalf of Jill Kelley's sister, whom a judge described as dishonest and lacking integrity.

Kelley is the woman who received harassing emails from Petraeus' biographer and paramour, according to U.S officials. She also is thought to have exchanged flirtatious communications with Allen, the top U.S. commander in Afghanistan. Pentagon investigators are now examining Allen's relationship with Kelley.

The new court files are significant because they provide of a fuller picture of the twins' connections to Petraeus and Allen, two powerful figures ensnared in the scandal. It also raises questions why two decorated generals would vouch for Kelley's twin sister, Natalie Khawam, who had piles of legal troubles in recent years.

Petraeus resigned Friday as CIA director after disclosures that author Paula Broadwell sent the emails to Kelley, who in turn went to the FBI, setting off a series of stunning revelations that have engulfed Washington just days after President Barack Obama was re-elected.

Both Allen and Petraeus wrote letters in September supporting Khawam in her ongoing custody fight for her son, D.C. Superior Court records show. Allen met Khawam, 37, when he was deputy commander of U.S. Central Command in Tampa, where they attended social functions. Petraeus said he met Khawam three years ago through Kelley.