When Your Housing Plans Become a Family Dispute

I'm going through a really difficult situation right now
A friend and I recently signed a lease together. We were both looking forward to moving forward with our living arrangements. However, things became complicated when we discovered a day into giving the end of tenancy notice that her family has an existing guardianship co-decision-making court order that neither of us knew about beforehand.

Now her brother is getting involved and says the family needs to agree before she can move in with me. A family meeting is being arranged to discuss the situation.

What worries me most isn't simply the disagreement. It's whether my friend's own wishes will actually be respected.

She's an adult who has expressed that she wants this living arrangement. I want her to feel comfortable speaking for herself, expressing disagreement, and making decisions without feeling pressured to please or accommodate her family.

There is also a lot at stake for me. We signed the lease together, and if she's removed from the arrangement, I could lose my housing as well.

I'm trying to find independent legal representation and an advocate who can attend the family meeting to help ensure things remain fair and that her voice isn't overshadowed.

I feel caught between wanting to respect her family relationships and wanting to stand up for her right to have her own voice.

I'm wondering how does people deal with family members trying to control an adult's living arrangements and disagreeing with their personal choice?