This couple's love is stronger than ever after the Brisbane family made a massive life-changing transition.

Little Lucas has two loving, doting mums (pictured above), but just before he was born, one of them was a man.

In 2014, Brisbane’s Susanna Liang was happily married to Andrew Hoffman.

They have been together since 2007 after meeting online, before marrying in 2011. During this time Susanna was completely unaware that her husband was living with a secret he’d hidden since childhood.

After some prompting, Andrew announced to Susanna his desire to transition to live as a woman.

Andrew and Susanna married in 2011. Picture: Susanna Liang.

Susanna had questioned Andrew after noticing small changes in his behaviour such as his voice sounding more high-pitched.

“I said, ‘what’s going on’, that’s when she said, ‘you’re going to hate me, but I want to be a woman’."

"All I knew was I didn’t want to leave"

Susanna was absolutely floored.

“I was in complete shock. I don’t think I processed it at the time. I was trying to make sense of it. It was all too surreal, I had no idea,” she tells Kidspot.

“All I knew was I didn’t want to leave. There wasn’t any other option in my head.”

Trying to understand Andrew’s feelings she researched online about people in similar situations.

Susanna and Andrew before the transition. Picture: Susanna Liang.

Even through her confusion, she never once considered leaving Andrew.

“The only lingering fear was thinking what was going to change, was everything, her personality, going to change?

"I was really in love. I thought I couldn’t leave, the thought of leaving was harder than trying to accept it."

The couple had planned to have a baby

Susanna told her family over email, and they were very accepting. It took Andrew’s parents a little bit longer to adjust to the life-changing news.

The couple had always planned to have children together, and once Andrew announced his desires, he decided he didn’t want to start transitioning, and taking hormones, until the couple were pregnant.

They had some trouble conceiving so they returned to Susanna’s home in Australia, from the United States, to start fertility treatments.

The couple are now parents to adorable 20-month-old Lucas. Picture: Susanna Liang.

“During the time I was pregnant, she started to take hormones"

A specialist revealed Andrew’s sperm count was very low and they would need to do IVF to conceive.

With the help of a sperm donor, Susanna and Andrew - now Andrea - fell pregnant on their first IVF cycle.

“During the time I was pregnant, she started to take hormones,” Susanna says.

Now they are the happy parents of 20-month-old Lucas – who is a very curious, adorable toddler who loves blowing raspberries.

The couple had counselling before they started IVF and were advised to tell Lucas their story, and not to hide it.

Lucas with mummy Andrea. Picture: Susanna Liang.

“Everyone knows so he’s going to find out some way, it’s better if we tell him,” Susanna says.

The couple definitely want more children and plan to use the same donor sperm to expand their family.

Andrea always felt different as a boy

As a child Andrea knew she wanted to be a girl, but she hid it very well. “She didn’t think it could be possible to change,” Susanna says.

“But it got to a point where she realised she couldn’t hide it anymore and she didn’t want to. She couldn’t live like that and tell our baby to be true to themselves. It was a turning point for her."

Over two years Andrew transitioned into Andrea and the couple welcomed a new baby boy Lucas. Picture: Claudia Baxter/Courier Mail.

“For me it’s a journey of adjustment"

It took a while for Susanna to come to terms with Andrea’s desires, and she continues to learn.

“For me it’s a journey of adjustment and it’s still ongoing, sometimes I miss things, but we are having fun now,” she says.

With the arrival of little Lucas, the couple's priorities have shifted.

“Now with our baby, we are completely about looking after our son. Whether the change happened or now, we are focused less on each other and more on our baby,” she says.

“We are just normal, we have a lot of fun together, it’s not too much about attraction any more but spending time together and doing what we enjoy.”

The aim is for Andrea to undergo full transition surgery in the next two years, but at the moment they are still saving money and have a GoFundMe page to help with costs.