Single mum shocked to find out her adopted children are actually brother and sister

When her marriage ended in her early 30s, Katie Page knew she wanted to do something different with her life - but she wasn't quite sure what that 'something' was.

She changed her job, bought a new house and started renovating the property into her dream home.

Despite all this she still wanted more.

After a couple of weeks in her new home, in the midst of ripping up the floors and tearing out cabinets, she received an email from her local church about fostering children and her attention was instantly captured.

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Katie, who lives in Colorado, went along to the meeting and says what she was told that day about foster care gave her "chills".

Writing in a post for LoveWhatMatters she said: "What I heard that evening about foster care gave me chills and scared me, but it also pulled at my heart in a way I couldn't stop thinking about it."

After spending time contemplating the idea, she finally decided to pursue it and in 2015 she completed her application and took the first step on a new adventure.

She began looking after children who had experienced trauma at a young age and came to realise she was keen to adopt a child and make things more permanent.

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Soon after making this decision she was asked to take in a four-day old baby boy who had been abandoned at a hospital.

The child, who hadn't yet been named, had drug exposure, but wasn't showing signs of withdrawal - he was perfect for her.

Katie took him home and decided to call him Grayson and for the next 11 months she looked after the youngster as care workers searched for his biological parents.

She explained: "No one answered the ad posted in the newspaper or came back to the hospital in search of the boy."

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So on the day he turned 11 months, the adoption became official and Grayson became her son.

But not even two weeks after, Katie received a call from her caseworker asking if she could help out with another four-day old baby - this time a girl.

Like Grayson, this baby had drug exposure and she'd been abandoned at the same hospital - something about these things made the single mum say yes to fostering her.

"Something was different about this one. I know over the next 10 minutes and subsequent phone calls I made that afternoon, the phrase 'I know I am crazy but God is telling me to say YES' kept coming out of my mouth," she admitted.

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She texted her caseworker to ask if it was possible - but they thought she was crazy.

However after tracking down and meeting with the baby girl's mum, she soon realised that she wasn't crazy at all.

The woman, who was pregnant once again, confirmed that she had one more child than the country was aware of - a little boy that didn't live with her - and the woman shared a strikingly similar appearance to Grayson.

The next week, Katie had the caseworker meet with the mother as well and shortly after the encounter her suspicions were confirmed.

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Her phone rang - it was her caseworker.

"Katie, I think you're right," she told her. "Her story breaks my heart and I can't believe it but I am 90% sure you're right and this is a miracle."

Forty five minutes later her phone rang again.

"Now I am 100% sure. We just found the last name she gave with Grayson's birth for a relative of Baby Girl."

Katie, who was at work at the time began crying in the middle of the office, she couldn't believe it - the two children really were siblings!

She adopted the baby girl, who she named Hannah, and describes the two children as being "partners in crime".

And their story doesn't end there! 13 months after Hannah was born, the birth mother welcomed another little boy into the world.

Katie has been fostering the third child since his birth and is hoping to adopt him at some point over the next year to complete her adorable family.