I assume that DiL is named too.The misdescription of what she is don't invalidate the will because that is what she was at the time the will was written.
If it was your will the divorce would invalidate the part of the will leaving anything to wife.
However it doesn't invalidate your mother' will.
It is the name which is important, not what she is. It could say "my friend" and she still gets the dosh even though they may have fallen out.
If it is half a property with an address or says "house that I live in at date of my death" and that address/house is sold before mum died, she gets 0. She doesn't get a cash equivalent or proportion.
Does that answerthe question and make sense?
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