Witnesses spotted Klum with her bodyguard, Martin Kristen, while she was on a family vacation in Sardinia, Italy. The sighting sparked rumors the two are dating, but Klum's friend, whose name was not reported, said they're not.
"It's complicated," the friend told People. "Their relationship is hard to define.
"This has been a difficult time. Her inner circle of people she trusts is getting smaller and smaller and he is her No. 1 confidante," the friend said of Kristen.
Klum's parents, Erna and Gunther, and her four children joined her on the trip to Sardinia.
The "Project Runway" host and judge -- who came to fame as a Sport Illustrated swimsuit model -- separated from musician Seal in January. The two were married for seven years.