SA can a Barister give me his opinion on this please

[David Octoman]

5-3 On the death of my said wife, the remarriage of my said wife or the death

Of my said son (whichever event shall last occur) UPON SUCH TRUSTS for

the benefit of all or any one or more of the children of my said son as

my said son by any deed or deeds with or without power of revocation

and new appointment or by his last will or any codicil thereto may

appoint and in default of such appointment or so far as any such appoint-

ment shall not extend in trust for my grandchild David Charles Octoman

subject to his attaining the age of twenty five years or marrying under

that age but if the said David Charles Octoman shall die before attaining

an absolutely vested interest in my residuary estate then subject to

any appointment made by my said son my trustees shall hold my residuary

estate upon trust for all my grandchildren who shall survive me and shall

have attained or shall attain the age of twenty one years and if more

than one in equal shares as tenants in common absolutely.

 

[David Octoman]

Ill add my understanding- Niel Octoman can nominate (dosnt actually say what hes nominating for in that section) someone or all, but if David Octoman is alive and over 25 or married before that then niel Octomans nomination is null and void.
The problem I have if im correct is that Niel Octoman nominated his son from the second marrage and he has recieved Charles caleb Dudly Octomans estate, or whats left of it.
My Father (Niel Octoman) and his second wife wife pluss there sons (my half brothers were allowed to be trustees when the original trustees retired. My father and his wife then embezaled prity much all that was in the trust, and im guessing my halfbrothers allowed this to happen or were also complisant.