The pair met in 2011 when Prue was 76 and he was 70.
They went on to get married in Scotland on October 2016.
Speaking about her marriage, she explained: “I had to get married in Scotland, because he refused to wear a kilt south of the border. I was determined, if I was going to get married this guy had to be in a kilt.
"So we went to Scotland where he was prepared to wear one. He won’t wear one south of the border, he thinks it’s naff. He’s got a very good undercarriage."
The couple lived a very unconventional life together as both decided to live separately until they decided to buy their first house together in November 2020, after being together for nine years.
Prue’s reasoning behind this was the fact they could have their "personal space" and then come together to enjoy "quality time together".
Prue expressed how happy she is with their decision to finally move in together, she says: "John calls our new home our 'retirement home'.
"We have to face the fact that we're going to live together for the very first time. It just feels like the right time now."
Prue has two kids from her previous marriage to South African author Rayne Kruger. It’s unknown if John had any previous marriages or children before Prue. The couple have no children together but John treats his step children as if they were his own.