Los suegros, cuñados y sobrinos de Sergio

su padre

In the text on the previous page, in the second paragraph, it says that “su hermano Sergio y su esposa Olga se refrescaban en el agua“. This means that his brother Sergio and his wife Olga was cooling down in the water.

Su hermano Sergio y su esposa Olga se refrescaban en el agua.

su madre

el surfista que conoció en el crucero

The answer is in the text on the previous page, in the first paragraph. There are mentioned “actividades aburridas”, which means “boring activities.”

Sandra estaba aburrida.