Jennifer Aniston & John Mayer's Hot Miami Nights (and Days!)

Two weeks after being outed as a couple, John Mayer and Jennifer Aniston were together again in Miami over the weekend and things were, well, hot. (See steamy photos of the couple here.)

On Thursday, John arrived at the Mandarin Oriental, where Jen has been staying while she's shooting Marley and Me with Owen Wilson. What followed was a hot weekend of lotion rub downs and hot kisses.

After keeping a low profile on Friday, the couple showed up at the hotel pool on Saturday afternoon. While there, they enjoyed cocktails, swam together, lotioned each other up and John even fed Jen some of his pineapple.

"Jen was in a pink bathing suit looking amazing," says our eyewitness. "John did the majority of the talking to Jen, who was listening to his every word intently and leaned in close while whispering in each other's ears."

At one point, Jen picked up a menu and acted like she was whispering to John, but she was actually giving him a kiss away from prying eyes. They didn't stop talking for the two hours they were at the pool, and John was showering Jen with affection calling her "sweetie" and putting his arm around her.

"When Jen got up to go to the bathroom without a cover-up, John stared at her as she walked to the single stall public bathroom," says the source. "She has a ton of confidence and looks fantastic!"

Later that night, Jen and John went to Nikki Coconut Grove — holding hands! — for Marley and Me' s Miami wrap party.

"The happy couple acted like they had nothing to hide," a source at the party tells Star, adding: I just hope John doesn't play games with her like he did the other girls. He seemed like he wanted to be seen with Jen for attention more than the fact that he really liked her.

Nevertheless, the source adds, "John seemed to be saying the right things to Jen as he put his arm around her and placed his hand on her leg. Jen was glowing and talking to other friends and introducing John to the cast and crew."

At around 2 am, the couple left the party. That afternoon, Jen checked out of her hotel to catch a flight to Philadelphia, where Marley and Me resumes shooting.

Check out our gallery of steamy Jen & John photos here.

Do John and Jen make a good couple? Do you think he's just using her? Tell us what you think.