Months of living in a tent in Haiti can make a guy wistful for good times past, especially when those good times involve a Sports Illustrated swimsuit model. But is Sean Penn reuniting with Jessica White, who he was first linked to last September, not long after splitting (yet again) from wife Robin Wright? The New York Post recently spotted the twosome drinking with pals -- and puckering up -- at the Gramercy Park Hotel's Rose Bar. "They kissed, sat close and ignored everyone," says a bystander. They were reportedly together again the next night, this time dining with a group that included Spike Lee. "[Jessica] mentioned she was back on with 'her man,' on- and off-camera," shares a source. The pair enjoyed more together-time over the weekend, cozying up at a Los Angeles pool party. Penn's rep, however, pours cold water on the rekindled flame speculation, telling the paper, "It's not true."