The 53-year-old television star hosted Thursday's episode alongside co-star Ben Shephard as she revealed she was able to see her husband over Christmas.
Derek is still in hospital recovering after contracting a serious strain of coronavirus which left him in a medically-induced coma.
Kate revealed she did see Derek during the festive period, and her two children, Darcey and William, did too.
The media personality said the visit was "very heightened with emotion", as they saw Derek who had "changed" after his coronavirus battle.
When Ben Shephard asked how her Christmas was, the presenter explained: "Well it was tough, wasn't it. It was tough for everybody."
She continued: "There was a lovely moment which we did have...we did over the period get to see Derek, and the children did so the was amazing.
"Of course, it was very heightened with emotion, because he's very changed."
"All the routines that we would normally do, it was one of those moments where it was so wonderful, but then it also amplified how sad everything was, does that make sense?", Kate added.
Ben said: "And how different it suddenly is."
"And how different it is yeah", Kate agreed.
"But it was still fantastic and very grateful to have had that opportunity."
Kate then went on to discuss not being able to see Derek at the moment due to England's nationwide lockdown.
She continued: "Yeah, we're into lockdown, no visits at all, which I hope doesn't continue for the whole of lockdown because I think that will be very impactful."
Kate had a difficult festive period as her house had flooded in the lead-up to Christmas.
She took to Instagram to share the tough time with her 970,000 followers, telling them "Christmas has been a challenge".
During her post, Kate thanked everyone who assisted when her house flooded.
She said: "We had a calamitous few days in the run up to Christmas - but we got through thanks to some wonderful people. The guys from @bondconstruction who literally got on their hands & knees with me to bucket out water after we had 2 pipe leaks that flooded our home.
"@emmawillisofficial & @marksandspencer who made sure we had #gorgeousfood for our Christmas dinner when I couldn’t get a delivery slot anywhere & the guys from @britishgas who spent hours on the phone helping me to get a fridge & freezer to put the food in .
"The guys from @skyhelp who talked me through getting our WiFi & tv working on Xmas eve. Your kindness & spirit is overwhelming . And all @itv & @global for their constant support."
"Sending love & virtual hugs to all of you who have sent messages - spreading the love is what will give us all a truly happy new year", she concluded.
Good Morning Britain airs weekdays at 6am on ITV.