Spanish language Q&A Forum

"Su familia la quiere mucho y, para ser sinceros, ha hecho muchos sacrificios por sus hijos." quote from cloze exercise

I do not understand to whom 'para ser sinceros' refers to.  Does it refer to 'su familia' or Eva, the daughter who made the sacrifices? 

Why is 'sinceros' plural since it refers to a singular noun, either su familia or Eva?

This sentence doesn't make much sense to me.

I understand the need for para in para ser sinceros to mean in order to be sincere, but I am confused as to why sinceros is plural and to whom it refers.

Thank you.

 Using para (and not por) for purpose, goal or objective

What is the difference between:
ser + [noun]

and 

ser un + [noun]

What is the use case for each?

The suggested translation of 'to go red on the face' sounds odd. In English, we would say 'to go red in the face' or, more colloquially, 'to get red-faced'

Why is it "Yo fui el primero DE mi clase" and not "Yo fui el primero EN mi clase" for "I was first in my class?" Is there any difference or is DE also acceptable?

Really enjoyed this!

If using the indicative or subjunctive is completely interchangeable without affecting the meaning, what are the reason(s) for choosing one over the other? Can you give some examples? 

I wrote 'maestra' instead of 'profesora' and this was marked as a mistake. But why, isn't it the same?

Four examples in the lesson.   In the last three ,you could translate con lo que as "despite"but that would not make sense in the first example and seems not to fit the pattern.   

¡Dios mio! Rafael Luis Díaz habló demasiado rápido para mí. No pude seguir el rítmo de su cuento. Al menos aprendí más vocabulario.