The Good Morning Britain presenter revealed Derek watched his wife on the ITV breakfast show.
The GMB presenter's husband Derek Draper is still in hospital, but said he would be "proud and pleased" at the party 11-year-old Bill received.
The daytime star took time out from GMB after her husband Derek Draper became seriously ill with Covid-19.
Derek Draper has been hospitalised since March after contracting coronavirus.
The presenter's husband is still seriously ill after being admitted to hospital with Covid-19 in March.
Piers Morgan Says Kate Garraway's Husband Remains In 'Serious Condition' As He Clarifies Health Reports
"It’s certainly premature at the moment to think Derek is in anyway out of the woods sadly on this," Piers said.
Kate Garraway Shares Emotional Father's Day Tribute To Husband As He Fights To Recover From Covid-19
The Good Morning Britain presenter said Sunday was a "tough day" as she discussed the "long road" ahead for her family.
Kate's husband Derek Draper is still in a coma after contracting coronavirus at the end of March.
Kate's husband Derek Draper has been in hospital since March after contracting Covid-19.
The Good Morning Britain presenter returned to the ITV show to update viewers on Derek Draper’s condition.