Are these uses correct?

Hello,

Could you correct or confirm these uses of "whose"?

We use whose to ask questions and to introduce relative clauses.

Let's only focus on "whose" to ask questions.

Use #1

We use whose to ask a question about possession. (inanimate objects)

Whose birthday is it today?

Whose house is that?

Whose car did you go to the party?

Use #2

We use whose to ask a question about possession. (pets)

Whose dog was in the car accident?

Whose parrot is in that picture?

Whose cat scratched the sofa?

Use #3

We use whose to ask about family relationships. (Is this one correct? Is that how you name this use?)

Whose mother is he?

Whose son is he?

Whose family isn't coming to the party?

Whose father drove you home?

Whose grandma made the cake?

Whose girlfriend is in London?

Am I correct about the following?

a) This question is incorrect; right?

Whose parents are Peter and Mary? They are Sue's parents.

It should be:

Who are Sue's parents?

b) This question is also incorrect; right?

Whose friend is Mary? She is Peter's friend.

It should be:

Who is Peter's friend? Mary (is).

Who is Mary's friend? Peter (is).

To me:

We use whose to ask a question about possession. (inanimate objects)

We use whose to ask a question about possession. (pets)

But we don't use whose to ask about friendship.

What about family relationships. Do we use whose?

I appreciate your help.