Mrs Murphy, of the North Shore, is giggly and bubbly, despite her deadline, though she walks with a limp because a large tumour on her spine causes her pain.
She says her friends envy her and call her a bitch because she looks better than them. "And I'm dying."
Only her husband sees her at her worst - at night when the tumours in her back hurt and she can't sleep.
"You can cry and the crying makes you stressed. And the stress makes your liver swell up and that makes it more painful ... but I'm lucky because my friends and parents don't have to see that because those moments usually only happen very late at night."
She talks matter-of-factly and not once does her voice waver or break.
But there is a note of melancholy as she talks about Jackson, about never being able to see him grow up.
And when she talks about her husband, the love of her life, finding someone else when she's gone.
"I hate the fact that he will someday find love again. But over time I've realised that that's what he deserves, that's what my son deserves - to see his dad happy and to have a woman's influence in his life. And one day that time will come.
"That's been a huge thing for me to get my head around ... I think that's when you know you really love somebody, because you just want them to have the best that they could possibly have."
On July 30, 2009 - the day before Jackson was born - Mrs Murphy noticed a lump in her left breast but her midwife told her it was probably from the milk and told her to focus on having her son.
"And so another five months went by with me massaging the crap out of it, thinking it was mastitis. But I was actually just spreading my cancer."
In December, she visited her GP after there was no change to the lump and it wasn't going away.
Then for two months, she waited for her referral letter from North Shore Hospital, but it never came because the hospital had no record of it.
"I had to start the whole process all over again ... I finally got my appointment in early March."
Eight months after finding the lump, she finally heard the words: "You've got cancer."
"But they then had a big stuff up with my CT scan and never got the results to my breast surgeon. I was literally in my hospital gown and ... was just getting on the bed to have my single mastectomy when my surgeon came running in.
"She said, 'I'm so sorry, I've just been handed your CT results and you're terminal. We can't save you'.
"I was so angry for so long, for having my life ripped away from me. I kept thinking I was too young for this and my poor little boy he doesn't need to lose his mum."
It's the couple's 10th wedding anniversary in March and they had planned to have a ceremony to mark the day. But after Mrs Murphy was given her deadline, they decided to have it earlier, on New Year's Day.
It is just one of a few special things she has on her bucket list. "It's about quality time with each other."
Mrs Murphy wants to go strawberry-picking with her son, take her husband on a helicopter ride, spend a week in Omaha at her cousin's bach and go to the Langham Hotel and have high tea with her mum.
Not big things, she says - fun things. "So when I'm lying in bed during my last weeks, I'm not regretting what I haven't done."
