Angela Chao, Sen. Mitch McConnell’s billionaire sister-in-law, spent her last minutes alive frantically calling her friends for help as her Tesla slowly sank in a pond on a remote Texas ranch, according to a report.

Chao, the billionaire former CEO of dry bulk shipping giant Foremost Group, tragically died at the age of 50 on Feb. 10 after accidentally backing her car into the pond while making a three-point turn.