Although the couple has been keeping mum about their relationship, their latest trip together definitely shows the relationship is heating up.  After Jennifer Aniston and boyfriend John Mayer dined with her best friend and former co-star Courtney Cox and husband David Arquette, whispers of a budding relationship were definitely confirmed.  Now, the couple has gone on a trip together to Mexico.  Jennifer and John first stepped out in April, and are now remaining in the public eye in Punta Milta, Mexico.  The couple is residing at Casa Aramara, a beachfront home where many celebrities have stayed before.