The DIY SOS host, 54, opened up about the reconciliation on ITV's Lorraine, telling host Lorraine Kelly that the couple's son Eddie's happiness remains of paramount importance.
'We're working on our relationship,' he said. 'Our essential point has to be our son Eddie… he's a real joy and makes me smile every day.'
Nick and Jessica, who married in 2012, announced that they had split in January of this year, although Nick remained a point of support for his wife when she was diagnosed with cervical cancer - news which she revealed to the public in July.
'Jess went through a terrible time with cancer, and now she's an ambassador for Jo's Trust, and she's doing a lot of that work, so we're backwards and forwards from where we live to London all the time,' Nick added.
'We're not going to work out our relationship in the public eye, but we remain the best of friends and things are going well together. And we are first and foremost parents to Eddie who we love very much.'
Rumours of the couple getting back together began circulating when Nick was spotted moving his belongings back into the family home.
28-year-old Jessica, who has since confirmed that she is now cancer-free, has yet to comment on the pair's current relationship status, but has always spoken positively of Nick, even throughout their separation.
'Nick is a wonderful friend, he's here all the time, he's amazing with Eddie,' she revealed during an interview with The Mirror when she was still undergoing treatment.
'Nick comes over and cooks me food, he's even planted flowers in my garden. He wanted me surrounded by colour.'
'He's still there for me but it's hard. I'm really sad we split. We're really amicable. He's still my best friend. I have so much respect and time for him.'