my son's mother-in-law = la suegra de mi hijo
(there is no single word for this relationship)
Shakira
It means, 'two offspring,' two children, or 'two sons.'
Three sons/kids
Arriba los hijos
The word for "boys" in Spanish is "niños." It is pronounced, "NEEN-yose." Sites such as learn-spanish.co.il provide audio pronunciations of many common Spanish words.
The spanish word for guitar is Guitarra. This English word came directly from the Spanish word, but it is not a Spanish word any more than the Spanish word is an Arabic word. "qutar" or a Greek word Chirara.
The spanish word for did is hizo.
"De" is the Spanish word for "of".
"Con" is the spanish word for "with".
The Spanish word for "who" is "quién".
The Spanish word for "in" is "en".
The Spanish word for "she" is "ella".