An eyewitness tells ET that the pair "were very romantic physically" and "looked very happy together." Theroux was very attentive to Aniston, especially when he took her paddleboarding.
Later, Theroux switched into a pair of black shorts for a romantic walk on the beach. Aniston covered up her midsection with a light blue shirt turned into a cover-up, which sparked pregnancy rumors earlier this week.
The eyewitness adds that during their outing, Aniston was not seen touching her stomach, drinking or smoking, but she did keep her tummy covered the entire time they walked on the nearly-deserted beach. They also snapped photos, held hands and exchanged sweet kisses.
On Wednesday, the two dodged the baby bump reports almost immediately after photos surfaced on The Daily Mail and the cover of InTouch magazine, which claimed "Jen's Finally Pregnant!" in the headline.