Oksana Grigorieva -- Plea Date with Baby Lucia

Oksana Grigorieva just took baby Lucia to a children's activities center in Sherman Oaks -- hours after we broke the story that daddy Mel Gibson is copping a plea in his criminal case.


Oksana was mum on the whole Mel issue while walking inside -- but her attorney Dan Horowitz told us she "trusts the District Attorney's office with their decision."