Helena Christensen on Heath Ledger's death

Helena Christensen – made one of her first public appearances since Heath Ledger's death, stepping out for Sunday's Y-3 fashion show, PEOPLE reports.

"Time passes," she told PEOPLE. "It's doesn't make it easier, but you try to do the best you can. When you have a child, they kind of bring you back to the moment in a really comforting way."

Christensen – who was linked to Ledger following his split from Michelle Williams, but always insisted they were just friends – had been on her way to visit the actor when his body was discovered. "I had just left him a message and heard his voice on the machine," she previously told Women's Wear Daily, adding that she was "beyond sad."