Baumgartner married Major William Carl on May 2, 1945. She met Carl, who designed the Twin Mustang P-82, while flight testing the plane.[6] Carl continued his career as an engineer and later designed and built hydrofoil boats for the United States Navy and Grumman Aerospace. Together they had two children. With her husband she sailed the Atlantic twice and cruised the Mediterranean, the British Isles, and the French Canals