When would you use the masculine form of a pronoun for a feminine noun

Question

would you use pronouns ending in 'n' (mon, ton, son) for nouns that begin with vowel or silent h? In doing a recent quiz for the noun 'petite amie' a 'sa' was used... should son have been used instead?

Accepted Answer

Hi A,
"Sa petite amie"(his girlfriend) is correct and the possessive adjective agrees with  the possessed (petite amie) not the possessor (the person whose girlfriend it is) .
Hope this helps!

Answer

And you would also use the masculine form if the noun starts with a vowel:
Son amie but sa petite amie. 
Even though amie is feminine, you use son because it starts with a vowel. With petite there's no need for this anymore because it starts with a consonant.

Answer

so in the case of amie, you would not need the 'n' as the adjective does not begin with a vowel. 
the pronoun changes as a result of the word following it and not the noun? 
sa petite amie
son amie