Your posts are very enigmatic and quite confusing.
It seems you have a pension and, in the event of your premature demise, you have nominated your children as beneficiaries.
You are still alive. You have made a will. Your wife inherits everything under that will. You want to know, on your death, who gets the personal pension.
You should change your will. It is a simple matter.
If this is part of matrimonial proceedings/ marriage breakdown, you need very specific advice on your specific circumstances. You should not rely on internet websites for such important information.
mf