Vacation swap

 Patricia was with her boyfriend Robert on vacation, on the first day of their stay they pissed off some local who swapped their bodies. After the first shock, however, they quickly recovered and found it quite an exciting experience. Pretty soon they started playing their new roles, Patricia the dominant boy and Robert the lusty, attractive girl. They adapted to their roles so much that they did not notice that with the change of body, their personalities succumb to the actions of the body, and their desire is an effect of fertility that the native imposed on them, Robert became pregnant during their stay, and this is one of the many babies who they will be had. For the fertility curse has an exact amount that the native chooses, and the native chose to give them a large family