“Look at me while I’m talking!”

Amanda Funderburg demanded in court that Rex Heuermann, the hulking monster who strangled her sister, Melissa Barthelemy to death in 2009, at least look her in the eyes.

Funderburg was just 15 when her sister was murdered in 2009 — and was forced to endure cruel mocking calls from Heuermann after the grisly slaying.

Stay up to date on the Gilgo Beach murders:

• Gilgo Beach serial killer Rex Heuermann’s chilling confession to his ex-wife, when he admitted he murdered ‘all except one’ of his victims in their home
• Gilgo Beach investigator who postponed retirement to see case through reflects on grim ordeal
• Jail boss reveals eerie trait that sets Gilgo Beach killer apart from other infamous inmates like John Gotti
• Family of Rex Heuermann’s Gilgo Beach victims get closure after decades-long nightmare: ‘Justice finally found you’

“I was forced to live with crippling anxiety, depression, PTSD, and destroyed nervous system constantly staring at my phone Funderberg told the confessed killer. :”Because of the several times you had called me from my sister’s phone telling me she was a whore.”

Funderburg was one of 13 relatives of Heuermann’s eight victims to speak before he was sentenced.