Why so much focus on the will? Its the terms and detail contained in the trust that's the thing. I'm sure there are many variations which were made to the trust document over the years, none of which we will ever be privy to.
I'm speculating but would imagine the trust is set up in such a way so as to mean his mother wants for nothing and is well provided for financially by the trust but when she dies those benefits ie the income she has received..die with her. In effect she will have a life interest only. She will not inherit anything so have nothing from Michael's estate to leave to anyone else in the family. She is probably benefiting from an income from the estate only.
I'm speculating but would imagine the trust is set up in such a way so as to mean his mother wants for nothing and is well provided for financially by the trust but when she dies those benefits ie the income she has received..die with her. In effect she will have a life interest only. She will not inherit anything so have nothing from Michael's estate to leave to anyone else in the family. She is probably benefiting from an income from the estate only.