Oh dear, @mugglemary that does sounds like a delicate and complicated family dynamic. It sounds like your brother behaved this way towards you before your injury as well as since the injury, and it doesn't sound like he's going to change any time soon. The only thing that can change is how you react and respond. Easier said than done of course.

While that must be hard for him to swallow that you chose his wife over him to be your family supporter for this study, it was wise of you to choose someone who can support you in a way that is healthy, helpful and supportive. Will you be spending the holidays with your brother and sister-in-law?