Is it possible to link 2 different Trust bank account to one NTUC fairprice union membership account?

Hi, does anybody knows whether i can link my Trust bank account to a family member's NTUC fairprice union membership account, instead of create a new Link membership account for my Trust bank account? This family member also has a Trust account that is link to this Link membership account.

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I can't find any information on trust bank website, and the customer service led me to fairprice app, yet fairprice said this is under Trust bank account purview.