Sir Paul McCartney's wife has reportedly 'never left his side' once since he became sick.
The Beatles singer was hospitalised in Japan Tuesday after falling ill with a nasty viral infection.
Apparently his 53-year-old spouse of three years, Nancy, has been sleeping in a room at St. Luke's International Hospital ever since he was admitted, as she is committed to seeing her husband get well.
'Nancy has been brilliant as always and has never left his side,' a source told British newspaper The Mirror.
Her presence is purportedly doing lots of good, as it is believed Paul is recuperating swiftly.
'[He is] on great form now and is getting back to his old self,' the insider detailed.
'He is getting better and better by the day.'
Paul's brother, Michael McCartney confirmed to the outlet his sibling is doing well.
But he claims the musician is approaching his recovery with as much ease as possible.
'I got a text from Paul yesterday [on Thursday]. He told me he was recovering slowly but surely, so I'm sure he's on the mend,' Michael said.
The 71-year-old singer arrived in Japan to perform his Out There! series of shows earlier this month, however he has since cancelled these performances and his upcoming concerts in South Korea.
When news broke that his Japan and South Korea tours were being terminated, a message was posted on Paul's website in which he apologised to fans.
'Doctors have ordered Paul complete rest and he has been doing all he can to get better," it read.
Paul's next stage performances will see him touring North America and aren't until mid-June, with no suggestion that they are under threat at the moment.