• I was two months pregnant when my sister asked to move in with my partner and me.
• At first, our dynamic was great, and we loved living together. Then, it got a little tense.
• We were in different places, and she eventually moved out, but we're now as close as ever.

When I was two months pregnant with my first child, my older sister called and asked if she could move in temporarily with my partner and me. She needed a fresh start and had decided to move interstate from the Gold Coast, Australia, where we grew up, to Melbourne, where I had been living for about a year.

At the time, my partner Sam and I were living in an old 1950s two-bedroom flat. I'd lived with my sister before in my 20s, so I knew she was easy to live with. After chatting with Sam about it, he said he didn't mind her crashing for a while until she got on her feet.

And so, a few weeks later, my sister arrived on our doorstep.

At first, living together was great

Luckily, my partner and sister have always got on well. Years ago, the three of us traveled through Laos and Thailand together, then later we backpacked around Cuba with my sister, so there was a lot of shared history between us.

Those first couple of months living together were really fun. My sister landed a corporate job in the city and quickly settled into Melbourne life. Melbourne is a cosmopolitan city that's known for its vibrant festival scene, which we embraced wholeheartedly. Every weekend, we would head to an international festival or cultural celebration together.

The household dynamic worked really well to start with. My sister paid rent, which helped us financially. We took turns cooking, and everyone got along. I remember coming home to find my partner squeezing my sister's blackheads on the couch one night and thinking, "Wow, this has taken their bond to a whole new level."

It was a time of transition, and things became a little tense

But it was also a really hectic time for Sam and me. I was battling the trials and tribulations of the first trimester of pregnancy and working full-time as a journalist, while Sam was trying to build his remedial massage business.

Within a few weeks of my sister living with us, Sam proposed to me. We'd been together for about eight years by that point, and with a baby on the way, marriage seemed like the logical next step. Suddenly, there was a wedding to arrange, which added to the stress levels.

After the wedding and honeymoon, I started to feel like the living arrangement wasn't really working out. My pregnancy was getting further along, and my hormones were raging. My sister was in a different phase of life. She was in party mode, while I wanted to nest, decorate the baby's nursery, and relish that so-called newlywed bliss that everyone talks about.

After a while, things became a little tense in the household. I began to feel like we needed our own space. I'm not very good at being direct with people, so I'd discreetly ask my sister how the house hunt was coming along. She eventually got the message and found a flat for herself after five months of living with us.

My sister moved out, and our relationship returned to normal

As soon as she had her own place, our relationship went back to the way it had been before. Sam and I were able to spend some quality time together alone before our son was born and our lives changed forever, while my sister could party guilt-free at her own digs.

Our son is 10 now, and my sister and I live in different states. She has a beautiful little girl of her own and has left the partying days behind. We're still as close as ever despite the eight-year age difference between us, and we often reflect on the happy memories we made in Melbourne together all those moons ago.

• When my sister was dying of breast cancer, she made me promise I'd live my life to the fullest.
• At first, I didn't follow through, but eventually I found the courage to act on my promise.
• I decided to move on my own to a beach town, where I met my husband.

When my older sister called to let me know that the painful lump in her breast was not a clogged milk duct from nursing her newborn, my world shattered. My 31-year-old sister was diagnosed with stage 3C breast cancer.

I immediately purchased a one-way plane ticket to stay with her and help with my 2-year-old nephew and newborn niece. Over the next two and a half years, I watched my once strong and bossy sister slowly become bedridden. She then became unable to walk or breathe without oxygen.

In our final conversation, I told her I wished I could take her place. After all, I had no children and was in an unhappy marriage. My sister replied that she was glad it was her and not me. She said she wanted me to have children and truly experience life.

She then asked me to promise to live a life for both of us, doing the things she wouldn't be able to do. She encouraged me to create happiness despite whatever difficult decisions I'd have to make. I made her that promise, altering my life forever.

At first, I couldn't handle the grief and ignored the promise I made

Her passing, though ultimately expected, rocked my sense of mortality and shattered me. We had always talked about growing old together in a nursing home and bickering with each other when we were 95, sharing a room like we did when we were kids.

At 27, I was deeply cognizant that I had no guarantee of time. Like everyone else, I thought I had decades before thinking about mortality, let alone a bucket list.

I was in denial for years. I lacked direction, strength, and self-worth.

Running became my outlet for grief. When I'd get tired and wanted to stop, I pictured my sister in her wheelchair, gasping for air, and took another step for her.

After my sister died, I had no mental or emotional energy to deal with my failing marraige. Having a baby didn't fix it.

I wondered if this was the life my sister envisioned for me as she was dying. Suddenly, I knew it wasn't. At 29, I finally admitted I was anything but happy and knew it was time to make a change.

I eventually acted on the promise I made with my sister

Braving the judgment I knew I'd face, I left my marriage and moved states with my infant and two large dogs to fulfill my dream of living near the beach despite having no family nearby to help. I started saying "yes" to more things and tackling my newly created bucket list.

An opportunity to visit Hawaii arose, and I jumped on it. In just one week, I skydived, got scuba certified, hiked a mountain at sunrise, and swam with sharks.

Keeping my promise to her — to say yes, to create happiness — changed everything. I gained confidence and self-esteem. That transformation led me to my life partner and now-husband, whom I met on the beach. We got engaged and married on that same sand.

Having my second child with him and feeling renewed in my career and personal relationships, I now live a life my 90-year-old self — and my sister — would be proud of.

I choose myself daily and remove what doesn't serve me. Every year, I celebrate aging; each birthday I see means I'm still alive, and I will never take that for granted.

I still live near the same beach where I rebuilt my life, and my car is covered in sand, dog hair, kids' toys, and sunscreen — just as I had always hoped.