The 38-year-old actress, who starred in the Stone Temple Pilots' 1999 music video for "Sour Girl," reacted to Weiland's death on Friday.
Soon after, he found out that his mother Sharon was suffering from progressive cancer.
As Scott Weiland and the Wildabouts band mate Nick Maybury states, "He was sad about his mom.
At a tour stop in San Diego, Weiland broke down crying on the street before sound check.
You've been granted all the things in life you want to do, and when one person pulls the rug out from under you, it's the worst," Dean De Leo told Rolling Stone in 1997.
The group broke up in 2003, though it reunited for a time in 2008.