Deciding to stay mum on Brooke Mueller's recent drug/assault arrest in Aspen Colorado last weekend, Denise Richards simply smiled as she shopped in Beverly Hills, on Monday.

The Wild Things star has publicly supported Mueller in the past, telling Extra in July, "I give Brooke a lot of credit. I know that she's struggling with her addiction and she wants to be the best mom she can be."

The celeb moms may share an ex-husband, Charlie Sheen, but Denise seems more interested in a quiet life raising her three daughters, while Brooke just can't seem to let go of her hard partying ways.

The troubled mother of two-year-old twins Max and Bob -- who were also in Aspen during the incident -- checked out of her most recent rehab effort in July.

Mueller was released from Pitkin County Jail for suspicion of assault and possession of cocaine with intent to distribute, after Sheen allegedly posted $11,000 bail on Sunday.

A hearing is set for Dec. 19.