Hi zed. That sounds pretty rough and it's not fair for her to do that. You might want to consider an option though that if she is unable to speak with you that she nominated someone to speak (and agree) on her behalf - like her brother. Its a middle ground short of lawyers
You MUST protect yourself financially though. ASAP.
Both mid 30s, 2 young kids BD 7sep14 XW moved on long ago, now living with OM1 D paperwork in progress