'I am her cousin by the paternal side'?

[Abc123]

Hi,

There're 3 people: A, B and C. B and C are both cousins of A. B's father is a brother of A's father and C's mother is a sister of A's mother. C says to B:

I am her cousin by the maternal side while you are by the paternal side.

Do you find the saying okay?

Thank you very much.
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Please help correct my mistakes whenever you see them. Many thanks :)

[Alan]

Hi,

I would say: On my Mother's side/On my Father's side.

Alan
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English as a Second Language
You can read my ESL story Present Simple