 Background Info.

My mum passed away last year and in her will, left the family home to the 3 of us (brother,sister and me)

 My brother, wife and 3 children currently lives there. Sister is in another country. She is not interested in this property. 

My wife and I moved out in the 80's as she wanted her own place.

 They had been taking of our parents (they were financially independent) until they passed on. 

My brother is a stay-at-home dad and has no other property.

 My brother and I have a joint agreement to sell the house upon the demise of any one of us and the proceeds to be distributed per mum's will. (Sister will also get her share) 

My brother and my wife are not on friendly terms. 

My family is financially stable

Current situation. 

A few months after the passing of my mother, my wife tells me to discuss with my brother to give us a time frame to sell the family home and split up the proceeds per mum's will, citing that it would be troublesome to deal with the legal matters after my passing as she claims my brother will not honour the agreement.

I told her I do not agree with her demands as my brother has no other place to move to and since he had been taking care of our parents, the least we could do is let him stay there. 

Wife demands we (brother and I) confirm a time frame. I begged her not to disturb my brother's family. She said that if I don't meet her demands, she would go and harass my brother until he agrees. 

Again I begged her not to. But she still insisted.

 As a final straw, I told her that if she still insists on harassing my brother's family, she would leave me no choice but to give my share of the house to my brother.

 Wife calls me a traitor to my family by putting my brother's family ahead of my own.

 I told her that everything will remain status quo if she backs off her demands.

 AITA for wanting to give up my share of the family home (if wife carries out her threat)  to my brother to allow him and his family to remain there?  