'She's the sweetest': Bristol Palin and Dakota Meyer celebrate their daughter Atlee turning three months old with a family selfie, after sharing a cute clip of her bonding with big sister Sailor

  • Bristol, 26, took to Instagram on Tuesday to share a photo of herself posed with Dakota, 29, and their daughter Atlee Bay
  • The mother-of-three bet that Atlee, who was born on May 8, will be her 'easiest' child because of the newborn's sweet nature 
  • The day before, Bristol shared a snapshot of her eight-year-old son Tripp, her only child with her former fiancé Levi Johnston, indoor rock climbing 
  • Bristol also recently posted a video of her one-year-old daughter Sailor Grace tickling her little sister Atlee while she was lying on the bed  

By Erica Tempesta For Dailymail.com

Published: 15:08 EST, 8 August 2017 | Updated: 15:12 EST, 8 August 2017

Bristol Palin and her husband Dakota Meyer are happily celebrating their youngest daughter turning three months old. 

The 26-year-old mom and the 29-year-old former Marine posed for a selfie with their daughter Atlee Bay, and Bristol proudly took to Instagram on Tuesday to share the family picture.   

'Our teeniest tiny is there months today!!' Bristol wrote. 'She is the SWEETEST and I'm betting will be our easiest, so in love.'

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Photo op: Bristol Palin and her husband Dakota Meyer posed for a photo with their youngets daughter Atlee Bay in celebration of her turning three months old 

Photo op: Bristol Palin and her husband Dakota Meyer posed for a photo with their youngets daughter Atlee Bay in celebration of her turning three months old 

Three-month-birthday girl: The newborn looked darling in a navy blue and white striped Ralph Lauren dress 

Three-month-birthday girl: The newborn looked darling in a navy blue and white striped Ralph Lauren dress 

The heartwarming family photo sees Bristol wearing leopard print shorts and a black tank top while she holds Atlee in one hand and her cellphone to take their picture in the other. 

Dakota is dressed casually in a red T-Shirt, gray athletic shorts, and socks as he poses with his wife and daughter in front of the steps of their home in Texas. 

Even their family dog Lucy made her way into the background of the celebratory photo. 

Bristol also took to Instagram Stories on Tuesday to share a snapshot of Atlee lying on the couch by herself. 

Ahead of the weekend, Bristol shared an adorable video of her one-year-old daughter Sailor Grace tickling her little sister Atlee 

Ahead of the weekend, Bristol shared an adorable video of her one-year-old daughter Sailor Grace tickling her little sister Atlee 

The sweet photo sees the little girl laughing while wearing a blue and white stripped dress with her diaper poking out of the bottom. 

After sharing the photo of Atlee, Bristol went shopping, and she couldn't resist taking a photo of a Christmas display that was out, writing: 'Almost time to start decorating.'

Meanwhile, Bristol's eight-year-old son Tripp, her only child with her former fiancé Levi Johnston, is getting ready to start school in Texas after living in Alaska for nearly his entire live. 

While thinking about how time has flown by since she first welcomed Tripp into the world, Bristol shared a photo of her only son smiling for the camera while indoor rock climbing. 

'Can't even begin to wrap my head around the fact that he's almost in 3rd grade [sad face emoji] my #TrippEaston. 

Time flies: On Monday, Bristol posted a photo of her eight-year-old son Tripp indoor rock climbing, noting that she can't believe he is heading into the third grade 

Time flies: On Monday, Bristol posted a photo of her eight-year-old son Tripp indoor rock climbing, noting that she can't believe he is heading into the third grade 

Looking back: Last week, Bristol shared this throwback photo, writing: '#WCW #throwback some of my most favorites!!!'

Looking back: Last week, Bristol shared this throwback photo, writing: '#WCW #throwback some of my most favorites!!!'

As a mother-of-three, Bristol is plenty busy, and ahead of the weekend she revealed what her life is really like at home. 

The mom shared an adorable video of her one-year-old daughter Sailor Grace tickling her baby sister, noting it was 'two under two life'. 

The footage sees the sisters wearing matching gray and gold onesies, and while Atlee is lying down on the bed, Sailor is sitting at her feet. 

Sailor happily pokes and tickles her little sister who giggles and coos as she watches her older sibling in awe. 

Bristol's eldest daughter is also getting bigger by the day, and last week she shared a video of Sailor saying her first sentence.   

The mom was filming the tot while her husband Dakota was away, and his absence was what inspired Sailor's first sentence: 'I want daddy.'

Proud mama: Bristol recently revealed on Instagram that Sailor Grace said her first sentence: 'I want daddy'

Proud mama: Bristol recently revealed on Instagram that Sailor Grace said her first sentence: 'I want daddy'

Happy dad: 'That's my girl,' Dakota commented on the adorable Instagram post 

Happy dad: 'That's my girl,' Dakota commented on the adorable Instagram post 

Unbreakable bond: Dakota proudly shared photos of Sailor with her little sister Atlee Bay last month 

Unbreakable bond: Dakota proudly shared photos of Sailor with her little sister Atlee Bay last month 

'My girl! I could watch this a million times (tell me if you can hear her first little sentence!!)' the proud mom captioned the Instagram clip. 

The video begins with Bristol prompting Sailor to say goodnight to her dad and blow him a kiss.

'Say muah! Say I love you,' she tells her little girl. 

Sailor tries to replicate her mom's words to the best of her ability, until she finally says how she really feels. 

'I want my daddy,' Sailor says, and when Bristol asks if she wants her daddy to come home, the little girl sweetly nods. 

After Bristol posted the clip on Tuesday evening, Dakota, 29, responded in the comments section, writing: 'That's my girl.' 

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