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This little girl's reaction when she finds out she is about to become a big sister is priceless - and you will struggle not to shed a tear when you watch it.

Lucy Gray seems quite confused when her mum tries to tell her that she is expecting a baby but this quickly turns to joy and delight when the penny finally drops.

At first, she assumes mum Lyndsay Hignett, of Knotty Ash, is showing her scan photos from when she was in the womb, something she enjoys doing regularly.

The eight-year-old then thinks her grandma is pregnant but, when she realises what her mum is trying to tell her, she lets out an excited scream, before feeling Lyndsay's stomach and then quickly hugging her.

(Image: Mirror Online)

It is a magical moment - and comes after her parents were worried that the message would get lost in translation through sign language, the Mirror Online reports.

Both Lyndsay, 36, and stepdad Paul Rowland have made an effort to learn sign language but, as they as not native speakers, communication can be difficult.

She said: "It can be difficult for her to understand these things sometimes."

In the video, filmed by Paul, she shows little Lucy a photo of a scan picture and points to her toy doll. She asks: "What's that?", as Lucy signs the word "baby".

(Image: Mirror Online)

When Lucy assumes her mum is showing her scan photos from when she was in the womb, Lynsey says: "No, not you," before pointing to her stomach and pretending to expand her already-showing baby bump.

Lucy seems even more perplexed, before asking if her grandmother is expecting another child.

"Not grandma, grandma's not pregnant. Mummy, now." Lyndsey continues.

Lucy shoots her a look of disbelief - she clearly has no idea what she is being told.

(Image: Mirror Online) (Image: Mirror Online)

"One baba, two babas," Lyndsey tells her.

But all of a sudden, the penny drops and she is stunned to silence, before letting out an excited scream.

She asks if the baby is a boy, before her mum tells they do not yet know the gender.

But little Lucy is positively beaming with excitement as she goes to touch her mum's stomach, while holding the scan photo.

Lydnsey looks overcome with emotion as she faces the camera, close to tears.

(Image: Mirror Online)

"Excited?" She asks her daughter, who replies with a resounding: "YES!"

Lyndsey, who quit her job as an English teacher to work as a teacher of the deaf after Lucy's diagnosis, is 12 weeks along and due on July 2.

Lucy has been "obsessed" with becoming a big sister last year - and enjoys playing with her baby toys.

Paul, a sales advertiser, said: "I was holding back tears, it was lovely to see.

"We were worried when she didn't understand at first, that she'd say: 'No no no', even though she loves babies.

"But you can see in her expression, she was absolutely amazed. Lucy is generous, caring and naturally really lovely. She will make a great big sister."