Barbara Windsor's husband Scott Mitchell has revealed she no longer remembers she's inside her own home.
The EastEnders icon, 81, was diagnosed with Alzheimer's in 2014, although her battle with the condition was only made public last year by Scott.
During an interview on BBC Radio's Steve Wright in the Afternoon on Tuesday, Scott admitted Dame Barbara has forgotten where she lives.
Scott said: "There's good and bad days, the confusion does progress and that I think what I've learnt by talking to other people is its very different for every case.
"It's very simple things that used to be very easy, whether that's signing something or writing a letter, opening something becomes a lot more stressful for her to live with and you as the carer to watch.
"At times very frustrating and irritable. It gets worse at night, with Barbara it's to do with our house.
"She constantly asks me over and over again at night whose house is this, we staying here, is this house I grew up with my mummy?"
Scott is running the London Marathon next month alongside Adam Woodyatt, Jake Wood, Emma Barton, Natalie Cassidy, Kellie Shirley, Tanya Franks, Jamie Borthwick and Jane Slaughter.
Meanwhile, Last month, Scott revealed Babs is desperate to find a cure for Alzheimer's to help others.
Speaking to the Daily Star, Scott said: "The heartbreaking thing is a cure is possible.
"They believe in six years a cure or at least major breakthrough could be found with the right funding.
"We both know it will be too late for Barbara but she still wants to do what she can to help find a cure. We both do."
She constantly asks me over and over again at night whose house is this.
Speaking about doing the marathon, Scott added: "It is Barbara who gets me through the runs because like most people running who aren't professionals I am doing it for a personal reason close to my heart.
"It is that thought that will keep me going on the day."
At the weekend, Barbara's former EastEnders co-star Kellie, who played Walford's Carly Wicks, said Babs doesn't know her name any more.
Speaking to Sunday Express' S magazine, the actress said: "A massive part of being an actor is remembering things.
"Your memories are such a big part of who you are. That's why I feel for Barbara."
She explained that Babs is able to recall "so much about the past as clear as day" but "she won't remember my name".
Leave us a comment on our Facebook page @EntertainmentDailyFix and let us know what you think of this story.