Jessica Simpson cuddles up to her seven-year-old son Ace in a sweet at-home selfie 

Jessica Simpson cuddles up to her seven-year-old son Ace in a sweet at-home selfie

She is a doting mom to her three children. 

But on Thursday, Jessica Simpson was all about her only son Ace, who turned seven-years-old just last month. 

The recently minted 40-year-old share the at-home selfie to Instagram and joked ‘I’m pretty sure this is my kiddo.’

Twins: On Thursday, Jessica Simpson cuddled up to her only son Ace, who turned seven-years-old just last month, to Instagram

The pair seemed to cuddle up in the family’s living room, placing their faces together. 

Jessica went fresh faced with glowing skin and no visible makeup on as a piece of her blonde hair covered one of her eyes. 

She gave a smile towards the camera, as she wore grey sweats and a blue denim jacket. 

Meanwhile, Ace flashes an equally big smile in a white Mamba Academy shirt and green printed shorts. 

Family: The singer shares Ace, and daughters Maxwell, eight, and Birdie, 15-months, with her husband Eric Johnson, who she married in 2014

Family: The singer shares Ace, and daughters Maxwell, eight, and Birdie, 15-months, with her husband Eric Johnson, who she married in 2014 

The singer shares Ace, and daughters Maxwell, eight, and Birdie, 15-months, with her husband Eric Johnson, who she married in 2014. 

Jessica seems to be exhausted by turning 40-years-old last week.

The Dukes Of Hazzard actress took to Instagram on Sunday to share an image from her 40th birthday complete with a floral arrangement and a cake inside her massive California mansion.

And in the blonde bombshell’s caption she said ‘a week into my 40’s already feels like a month.’

A new era: Jessica, who turned 40 on Friday seems to be exhausted by her new milestone, joking the week felt 'like a month'

A new era: Jessica, who turned 40 on Friday seems to be exhausted by her new milestone, joking the week felt ‘like a month’

She turned 40-years-old on Friday.

On Thursday, Simpson said goodbye to her 30s by showing she could still fit into her 14-year-old True Religion jeans.

The mother-of-three looked strikingly slim in a mirror selfie where she posed in tight distressed denim which showcased her 100lb weight loss.

The former pop star took the snap in her bedroom at the home she shares with husband Eric Johnson and their kids Maxwell, eight, Ace, seven, and Birdie, 15 months. 

A decade: She began dating her now husband, Eric, in May 2010, getting engaged in October and marrying in 2014

A decade: She began dating her now husband, Eric, in May 2010, getting engaged in October and marrying in 2014

Her legs looked ultra-svelte in the frayed blue jeans, which she paired with a trendy tie-dye hoodie. 

In the caption alongside the picture, Jessica wrote: ‘I have kept these throwback True Religion jeans in my closet for 14 yrs (I’m not exaggerating!).

She added: ‘I figured that since I’m in the final hours of my 30’s I’d give them another try, and hello 40, so nice to meet you.’