A sure sign that a wholesome Disney teen idol has officially become a man: He enjoys some pool-set PDA with a bikini-clad older woman. Over the weekend, Nick Jonas, 18, was snapped soaking up his surroundings with girlfriend Delta Goodrem, 26, at a resort in Los Cabos, Mexico. In between taking a dip a deux, Nick serenaded his Aussie squeeze with his guitar and held her hand as they basked in the sun. "I am in a great place and am very happy," Jonas recently said (via the New York Daily News). "[I'm] thrilled to be doing what I love and to have someone who cares for me."