One more question, please.


I have this sentence to ask you, "I" is the subject of the sentence while "who" is the relative pronounce of "I", the question is that "who" should be used with "is" or not or should it be "am" or somethingelse?

"As I am herein, in the status of being brother-in-law of Miss. Mayuree, who is a younger sister of my wife."


Thank you and best regards,
Piak