Very small correction:
getting in the car with dad
In the above phrase, "dad" should be capitalized as "Dad". It is being used in place of a man's name and, therefore, is treated as a name. And names are capitalized, right?
On the other hand, if the phrase is changed to
getting in the car with their dad
then it is not capitalized because it refers to a relationship and is not a substitute for someone's name. A good clue to watch for is the possessive before a noun as father, mother, grandfather, grandmother, etc.
Mom says that Gramps is coming at noon.
Mom says that my gramps is coming at noon.
My dad loves Mom.
My dad loves my mom.
I know that Dad loves my mom.
I know that my dad loves Mom.
My gramma makes cookies that Grampa loves to eat.
Gramma makes cookies that my grampa loves to eat.
If my gramma bakes cookies, my grampa eats them all.
If Gramma bakes cookies, Grampa eats them all.