Sudiksha Konanki was traveling with six other female students in Punta Cana when authorities said she drowned in the ocean.
While officials say the woman died from a sudden heart attack, her son says she would still be alive if she never went to the country.
Joseph Allen, 55, of Avenel, New Jersey, was found dead in his hotel room at Terra Linda in Sosua on the morning of June 13.
The couple died of respiratory failure and pulmonary edema, according to a statement from the country's police.
Another American died during a stay in the Dominican Republic, the U.S. State Department confirmed on Wednesday.
An Atlanta woman said she got sick on vacation in the Dominican Republic.
