Britney Spears took to Instagram Tuesday evening to share that she's thinking about having another child, and her fiance Sam Asghari quickly reacted to her post.

The 39-year-old singer shared a black and white photo featuring a toddler and a mother's feet and tagged Kei Moreno di Tomasso in the snap. In it, the mother could be seen standing on both her feet while the baby appeared to be reaching for something as she stood on her toes. 

"I'm thinking about having another baby !!! I wonder if this one is a girl," Spears wrote in the caption. "She's on her toes reaching for something … that's for sure."

Asghari, who got engaged to the pop star in September, took to the comments section to react to the image. The 27-year-old personal trainer took a dig at his own legs, writing, "I hope she has great calves like that! That genetic wouldn't be coming from me _ #chickenleg."

Comments from fans quickly poured in as well. One of them noted that Spears is a great mother and her sons would be amazing big brothers.

Another fan wrote, "This is a story about a girl named lucky ... she was lucky to have Britney as her mom."

Meanwhile, another supporter commented, "Freed and ready to seed!"

Spears shares two sons — Sean Preston, 16, and Jayden, 15 — with rapper Kevin Federline. They were married from 2004 to 2007.

The singer first met Asghari in 2016 on the set of the music video for "Slumber Party," where Asghari played Spears' love interest. They began their relationship in January 2017. 

The couple has since been posting their photos doing things together like hiking, cycling, celebrating birthdays and attending events. 

Over the weekend, Asghari took to Instagram to talk about the end of Spears' 13-year conservatorship, noting, "History was made today. Britney is Free!"

The image he posted featured a plain pink background with the word "freedom" written on it.

As far as kids are concerned, a source told US Magazine in March that Asghari has always "dreamt of having children and thinks he would be a great father."

"He's a natural around little kids," the insider added.

Britney Spears, shown here in 2019, has indicated she would like to have another child and has plans to wed her boyfriend Sam Asghari Britney Spears, shown here in 2019, has indicated she would like to have another child and has plans to wed her boyfriend Sam Asghari Photo: AFP / VALERIE MACON