By VINCE REMBULAT 209 staff reporter Jessica Arnaiz received some much-needed pampering. For the Stockton mother of three, this was just what doctor ordered about a year ago. Actually, it was her gym friends, Juanita Armendariz and Maria Ochoa who treated Arnaiz, who was celebrating another thirty-something birthday, to this girls day out at Southern Exposure, 2323 Pacific Ave. Stockton.