... to "decline" a bequest?

[FallenArchesBrokenDreams]

My father is dying.
He's got end stage dementia so really I lost him years ago so I've done my grieving.
His small estate is divided between myself and my 2 siblings equally.

Myself and Dh are comfortably off, the inheritance will make a small but not signifcant difference to our financial status.
However even a third of the small estate will be very useful to my youngest sister whois not well off at all. She has no debts but has no money spare for luxuries. She is very proud and has always refused offers of help unless they are very small and disguiysed as a birthday present.

Can I decline the bequest? and if so does the estate just get divided between sister 1 and sister 2 equally?
Are there tax implications for doing this (if it is even possible)
Obviously my father can change his will.

I feel she not only needs the money more, I feel she has earned it as she lived closest to Dad so did most of the "things" he needed

[FallenArchesBrokenDreams]

Thank you for all your comments.
Re Sister3's benefits. It is possible that the third of the estate to which she is already entitled may mess up her benefits, and making her bequest larger may not really matter.
I need to check about the effects of one off bequests on benefits, what the threshold is. Trouble is, I'm not really sure what she receives apart from some subsidised housing which is the smallest flat known to man!

[marriednotdead]

You sounds as if you're trying to do a lovely thing, and I hope you can find a way to ease things for you sister.

You may be surprised at how you feel emotionally when your father's time finally comes, I hope it is peaceful whenever it happens

The cap on savings for most benefits is £16k and spending/redistributing to get below the threshold can potentially cause them to refuse to reinstate.

Would you be willing to perhaps treat her to an annual holiday and help maintain your relationship in the process?