The distasteful nature of the thread aside, it's worth saying again that care costs are astronomical and could wipe out any inheritance you anticipate getting.
My parents needed long term care (alzheimers and dementia with a raft of other physical complications including double incontinence and mobility issues).
First the house was put under protection, even though I was living there. I was given six months to find alternative accommodation. Then it was sold, then the savings and assets were accessed until only £14,000 remained in the account.
My sister and I received nothing even though we were both beneficiaries in the will.
Here in the Midlands, care costs £4,000 per month per person (back in 2010). I've no idea what it costs now. That doesn't cover everything of course. So you're talking nearly £100,000 per year for a couple in care. My parents lived for ten years in care. Trust me, it doesn't go far.
If your parents are rich and intend to pay for private care then you won't face this problem but alas for the average person who relies on council care, then inheritance is probably not something to bank on.
Oh, and they can go back fifteen years to see if you've intentionally transferred assets to friends or family as a way of reducing the availability of funds when the time comes.