"At the moment we are just with her, holding her, whispering things to her and starting to tell her about the support out there."
He said his family were "humbled" and "overwhelmed" by the support of not only friends and family but the wider community.
A Give a Little fundraising page established for the family this week has now raised more than $200,000.
"We feel very loved ... We are very grateful, and having that support will allow us to focus on Lucy and get her well."
The fundraising website had its busiest day since it was launched this week as people raced to donate money to Ms Knight, who was allegedly assaulted as she tried to stop a youth stealing an Asian woman's handbag at Countdown Northcote.
It is understood the Asian community, particularly Chinese people here and overseas, had rallied to support the cause and set a fundraising goal of $150,000, which was easily passed on Thursday.
Donations of food, petrol vouchers and other grocery items were also being offered to the family. Local businesses were offering to deliver food and supplies to the family, and the Northcote school the couple's youngest children attend, St Mary's, was helping with donations.