"I think he will be so upset that I didn't go," she told Channel Seven's Sunday Night program in the interview, which was broadcast last night. "But, you know what, I supported him every single day I went. Just today was for me. I didn't want to go."

Ms Louise, 24, was being filmed as she received a text message informing her that Gittany had been jailed for at least 18 years, with a maximum of 26 years, for throwing his former girlfriend, Lisa Harnum, from his 15th floor Sydney apartment in 2011.

"Told you it would be over 25, I knew it," Ms Louise said of the sentence as the text message came through.

Asked whether Gittany was culpable for making his girlfriend "distressed, fearful and desperate", Ms Louise said: "No, those are her own actions, not Simon's."

She said she did not believe Gittany was capable of lifting his 50-kilogram girlfriend and throwing her over the balcony, and dismissed as "rubbish" the account of key witness Joshua Rathmell, who said he saw someone unloading an object off the balcony at the time Ms Harnum fell.

"I think that he's [Rathmell] seen her fall and then he has just created a false memory," she said.

Ms Louise said Gittany was 169 centimetres tall, and she did not believe he could pick up Ms Harnum, who weighed 50 kilograms, and heave her over the balcony.

"Absolutely not, I don't think that. I'm 50 kilograms, and do you think you can pick me up?" she questioned interviewer Ross Coulthart.

Coulthart responded: "I don't know, do you want to try?"

Ms Louise agreed and lay down on the ground, and Coulthart tried to pick up her limp body.

He managed to elevate the top half of her body, but her feet remained touching the ground.

"It was difficult for me to lift a live Rachelle without hurting her," Coulthart said in the broadcast.

Ms Louise also revealed that, after Gittany's sentence was handed down, he had urged her to move on and start a family with someone else.

"Well, when he was eventually found guilty he did, he said to me, like, you know, move on, like I don't want you to stay around for me," she said, before she broke down crying.

"Sorry. Like move on, but I didn't want to; do you know what I mean? Like, I really think that this is wrong, what they're doing to him. I vowed to him that I will stand by him."

However, in an extended interview shown on the Sunday Night website, Ms Louise said she would give him five years to prove his innocence before seeking out another relationship.

"I do want to start a family of my own one day, so I mean I'm not going to wait that long," she said.

Asked how long she would wait for Gittany, she said: "Right now I said he's got five years. Because 29, you know, going into 30s ... "

However she said she did want to marry Gittany and have children with him.

"Simon would be the best father ever. He really would. He would be such a brilliant father," she said.