Britney Spears received a special Mother's Day shout-out from her boyfriend, Sam Asghari.

"Happy Mother’s Day to all the beautiful mothers out there doing the toughest job in the world!" the 25-year-old captioned a throwback photo with Spears shared on Instagram Sunday.

Spears is the mother of two boys – Sean, 13, and Jayden, 12 – with her ex-husband Kevin Federline, whom she was married to from 2004-2007.

Spears, 37, and Asghari met in 2016 on the set of her "Slumber Party" music video.

"I was excited that I get to meet one of the biggest artists of all time,” Asghari recalled to Men's Health in an interview last year. “I had butterflies."

In April, Spears entered and checked out of a wellness facility, according to reports from CNN and People.

Spears explained on Instagram on April 23 that she was "trying to take a moment for myself."

"My family has been going through a lot of stress and anxiety lately, so I just needed time to deal," she said in a video.

Spears appeared in court Friday to speak on her conservatorship, which began in 2008. It named her father, Jamie Spears, and lawyer Andrew Wallet, her permanent conservators of her affairs. Wallet resigned as co-conservator in March, according to Entertainment Tonight and Variety.

The Associated Press reports Judge Brenda Penny "ordered a so-called 730 expert evaluation, a competence examination that is usually used for parents in divorce cases." Spears and her parents, also present, agreed to be evaluated according to Penny's order.

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Honoree Britney Spears and Sam Asghari attend the 29th Annual GLAAD Media Awards at The Beverly Hilton Hotel on April 12, 2018 in Beverly Hills, Calif.

Prior to Friday's court appearance, Spears was granted a temporary restraining order Wednesday against Sam Lutfi, the man who has described himself as her former manager.

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A judge ordered Lutfi, 44, who has been in legal fights with the Spears family for a decade, to stay at least 200 yards from her, her parents and her two sons and to not contact or disparage anyone from the family.

According to court documents obtained by E! News and Entertainment Tonight, Lutfi previously sent "threatening texts to Ms. Spears' family, he has leaked confidential information and is considering releasing more of Ms. Spears (actual and fabricated) private information."

Lutfi is also accused of posting negative comments about Spears on his social media accounts and encouraging his followers to take "vigilante action" to attempt to change the singer's conservatorship.

Contributing: Maeve McDermott and The Associated Press

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This article originally appeared on USA TODAY: Sam Asghari celebrates girlfriend Britney Spears, those with 'toughest job' on Mother's Day