Hello vkurkjian

As a Philippine citizen, your mother, as well as yourselves, can apply for the Spanish Nationality by residence after two years holding a residence status in Spain. Children under 18 years old would also be able to apply if they lived, holding a residence status, with their mother in Spain, regardless their place of birth. However, children over 18 cannot apply as if Nationality was acquired by your mother based on residency and not on origins or family ties, she cannot extend the right to her descendants, as she is not a Spanish national by origins.

I trust this information has been helpful.

Regards,