Brooke Mueller Tries to Derail Charlie's 'Train' Story

8/10/2010 6:00 AM PDT

Brooke Mueller Tries to Derail Charlie's 'Train' Story

Charlie Sheen's estranged wife Brooke Mueller returned to the spotlight for a dinner date at XIV with her mom in Hollywood last night  ... but when asked about the alleged altercation with Charlie, she got right off the Train tracks.

One day after Aspen police released the report from the Christmas Day incident -- in which Charlie told a cop that his fight with Brooke started over the Train song "Drops of Jupiter" -- Brooke was deflecting like crazy, pretending she had no idea what the photogs were talking about. 

Brooke's mom, on the other hand, called the Train story, "Silly."

Brooke did answer questions about her kids ... and herself ... telling photogs that she's still a "happy camper."