Urgent advice needed. Elderly parent being dumped at Airport!

[Vickibristol123]

In advance I thank anyone who has taken the time to read this and maybe offer any help or advice.
My dear Friend (I will call him John) has an elderly mother who has been living in Portugal for the last 15 years. She moved over there to care for her Uncle who is also in Portugal.
The Uncle is physically unwell and she has been living and caring for him all this time.The Uncle has a daughter that has now contacted John to say that Mother is not coping and has gone rapidly down hill with episodes of mental illness and has now been diagnosed with Dementia.
The daughter has told him that she is bringing them both back to the UK on the first available flight and from then on she is John’s problem.
I have known John for many years and I don’t know quite how to put this but....he’s not capable of looking after her physically or mentally, he can barely look after himself, lives in a house with no heating etc and has a lot of social/mental health problems himself.
I’m at a loss how to help him, potentially there is a confused little old lady landing here with nowhere to go and no one capable of caring for her.
I add also that she does have finances so is able to pay for care if needed.
How on earth do I help him?
Any advice would be amazing!

Oh dear, all very complicated and sad. Best of luck.

Nowt so queer as folk.

Maybe they should not live together/ have contact after all.
If he is a lot older it might have been abusive. Certainly it would have been illegal for them to marry.
I suspect safeguarding questions will be asked if U.K. social services get involved.
May have been her choice but it's more than a bit creepy.

"It’s another complication it seems but one that has not been addressed by the family."

Is this how things have got so bad then, that they had more or less been left to it as people disagreed?

I knew someone who married her non blood Uncle after her Aunt died & they were largely disowned.

isn't it illegal. in any country, surely that's incest.
was it that the woman now has dementia but was looking after uncle who had a physical disability, so presumably not dementia, so he would seem to be the perpetrator, and she the victim of this incestuous set-up.
as to her return to uk.
when attending hosp appts we are asked at each one, repeatedly, whether resident in uk for last 2 years. implication seems to be that if not, will have appt cancelled or be presented with a bill eventually. apart from emergency treatment, i believe there are overseas depts in each hosp that chase up payments from overseas people who have tried to get services free.