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When Corey House told her mum she was transgender, she finally felt free.

Born a boy, she was suddenly able to wear female clothes outside of her home and begin transitioning into the girl she felt she'd always been.

Her mother Erica was extremely supportive, even surprising the 14-year-old with her first box of oestrogen.

And now, it is Corey's turn to give back the support after Erica revealed she is also transgender and transitioning into a man.

(Image: Eric House)

The American dad-of-six, who now goes by the name Eric, realised he was 'born in the wrong body' at the same time as his daughter.

But despite the realisation four years ago, he decided to hide his true identity, while Corey started her own transition into a girl.

(Image: facebook/Corey Maison)

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He finally came out to husband Les in 2015 after his daughter's transformation gave him the courage to let go of his "awful secret".

He later told the rest of his family, including children Chelsea, 22, Kailee, 14, Corey, Ellen, eight, Willow, six, and four-year-old Savanna.

(Image: Eric House)

Speaking to Mirror Online, Eric described how Les was incredibly supportive about his revelation.

"It was an awful secret to keep from my family," he said.

"My loved ones were awesome, almost like nothing really changed. My husband has been supportive through everything.

"Our relationship is actually stronger and better than it ever has been in the 10 years we've been together."

(Image: Eric House)

I am waiting to have my top surgery hopefully next month," he continued. "I will have been on testosterone for one year on February 10.

"I finally feel complete for the first time in my life."

(Image: Eric House)

Corey said her family, who live in Detroit, Michigan, were also supportive after she revealed she was transgender.

"They didn't really react since I'm still who I've always been," she said.

"The only thing that was different was that I started wearing girls' clothes outside of the house."

"I finally felt free once my family knew."

(Image: Eric House)

However, Corey said that she lost some friends when she started transitioning.

"They finally came around and we are friends again," she said.

The teenager had been previously bullied growing up for being "overly feminine".

(Image: Eric House)

Eric and Corey both realised they were transgender while watching a TV interview of YouTube star and transgender teen, Jazz Jennings.

At the time, Corey was 11-years-old.

While she declared: "Mom, I am just like her, I am a girl," Eric decided to keep his feelings a secret.

Now, after both finally revealing their true identities, the pair are able to support each other - in a truly unique way - as they transition.

(Image: Eric House)

They are believed to be the world's first parent and child to publicly state that they are both transgender and transitioning.

While Eric is awaiting surgery on his chest, his daughter is looking forward to her 18th birthday - so that she can go under the knife.

"Once I turn 18, I can finally have surgery," said Corey, who broke down in tears after Eric surprised her with her first box of oestrogen in 2015.

The teenager added that, although she would like to date boys, "most of them are too embarrassed to admit" they might like her.

"I do hope to start dating," she told Mirror Online.

(Image: Eric House)

Corey, who has her own public Facebook page , has amassed tens of thousands of fans worldwide after coming out as transgender.

She said: "I am so happy that my story inspires people and is saving lives."

She added: "I want to tell anyone out there who is trans to find someone you can talk to. Find someone who wont judge you that you can go to if you need a friend."

Eric also stressed that no-one should ever be "ashamed" of their true identity.

"My message would be to never, ever be ashamed of who you are, and never let anyone else's view of you make you think you are less than you are," he said.

"Always be proud of who you are."

(Image: Eric House)

Last year, a picture of Corey sparked a fierce debate on Facebook after a photographer posted it to raise awareness of transgender issues.

Meg Bitton uploaded the image of Corey on the social media site in protest against controversial laws which came into force in North Carolina.

The new legislation said that people must use the bathroom that corresponds to the gender on their birth certificate.

She posted an image of Corey to Facebook along with the caption: "If this was YOUR daughter, would you be comfortable sending her into a men's bathroom?

"Neither would I. Be fair. Be kind. Be empathetic. Treat others how you would like to be treated."

Although the photo received some negative attention, most people were supportive of Corey and her family.

Do you have a story to tell? Email sophie.evans@trinitymirror.com