Father distributing his wealth during his lifetime
Q: My father distributed his estate during his lifetime. The following questions come to mind:
1. If it was given away in his lifetime, was it necessary to give the brothers double share and if it was done like this, is this valid in shariah?
2. His house was given to my mother with specific instructions to give it to my brother so that in does NOT go into her estate upon her demise. Was this correct?