"The reason why I haven’t said anything is because I can’t, because this happens," Lisa confessed as she wiped away tears.
She was supported by her husband Mark Tabone who briefly appeared on-screen to comfort Lisa as she attempted to speak through her grief.
"It's been really, really hard and people have been really supportive. I think what I’ve learnt most is that every second person walking along the street is going through the same thing," she said.
"It's really important to be empathetic of people and be kind to people and know that people walking around feeling like this all the time, but people don’t know about it."
Lisa also revealed that it's "very, very difficult", before adding that the love and support of her family, especially her two grandchildren, has kept her strong.
"The little boys Flynn and Taj, they keep me occupied, I was babysitting them last night, so that was really nice," she said.
Lisa also admitted that Jaimi's dad Grant is "good except, you know, he’s struggling a lot as well."
Lisa will be opening up further on the tragic death of her eldest daughter in her new memoir, which will also detail her swimming career.
The book will be called Lisa: 60 Years of Life, Love & Loss and will be released in May next year.
"I have lived a pretty big life, with a lot of love, and some very heavy losses. This book is both my story and my survival guide for others," Lisa said in a statement.