And should he be selected in Queensland's extended squad for the first time next month, Jane won't let him turn that down either.

When everything has seemed too hard this year, the Newcastle utility has wanted to leave the NRL bubble, jump in the car and start the end of their time together.

But as his mum battles a rare and terminal cancer from her home in Queensland, the 27-year-old Knights utility will do anything he can to make her happy.

No matter how much heartbreak it causes him personally.

"She would be absolutely stoked with that if I did get picked (in the Queensland extended squad) so I don't think she would not let me go," Mann told AAP.

"She would be trying to follow me around as much as she could.

"The last Origin game is in Queensland, if I was to get picked in that she would be stoked with that.

"She would be there and everyone would be able to hear her in the whole stadium."

Watching her boy play for the Knights brings Jane so much joy she has not allowed him to end his season early as she battles cholangiocarcinoma.

Nor will she allow him to turn down a Maroons jersey just so he can avoid the strict bubble restrictions that have prevented them from spending time together in her last months.

She was able to watch him play the final game of the season against Gold Coast last weekend, when they saw each other from over the fence.

But due to the restrictions they were unable to hug.

Mann is currently working through a way to get to her as quickly as possible once the Knights' season is over and he can break the bubble.

If it means doing a mandatory two-week quarantine to get into Queensland so be it.

"It's been difficult but I talk to her as much as I can," he said.

"I'll spend some time with her at the end of the year and make sure it's the best time of her life and the best time of my life.

"We've got to enjoy the days we've got left together and that's the main thing really, just to be together as a family."

Sunday's elimination final against South Sydney could be the last game of an unimaginably hard year for Mann, but he will give it everything he's got for his mum.

"She's pretty adamant that she's not dying yet, that's the thing she always says to me," he said.

"She enjoys watching me play footy, I'll keep doing that just to make her happy. I'll play footy for her."

Australian Associated Press