If used as common nouns, don't capitalize, as in: We honor all mothers in May. In other words, capitalize words such as Mother, Father, Grandmother, Grandfather, Son, Daughter, and Sis when they are used in place of the person's name.

Is Mom capitalized in my Mom?

Proper nouns are capitalized and common nouns aren't. In other words, when “Mom” and “Dad” are used in place of a person's name, they're capitalized. ... If the sentence works with the name inserted, capitalize “Mom” — just like you would if you were using her actual name. After school, Susan took me to my piano lesson.

Do you capitalize aunt Sally?

Correct: The other day I went shopping with my aunt. However, when referring to an aunt by name such as “Aunt Audrey,” then the word aunt is capitalized because it is a part of the name so it becomes a proper noun. This is also true when asking a question of your aunt.