Photo: Getty

Britney Spears offered a glimpse at how her two teenage sons, Sean Preston, 15, and Jayden James Federline, 14, are growing up.

The pop star took to Instagram to share a rare family photo featuring her and her two sons, whom she shares with her ex-husband, Kevin Federline. In the image, Spears poses in between her guys while out on what appears to be a hike together. Dressed casually for the family portrait, Spears is wearing a grey V-neck T-shirt, baby-pink athletic shorts, sneakers, and sunglasses. And all three are wearing protective face masks while out and about, due to the ongoing COVID-19 pandemic.

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“It’s so crazy how time flies ….,” wrote Spears in her caption. “My boys are so big now 👩‍👦‍👦 !!!! I know … I know … it’s very hard for any mama especially a mama with boys seeing them grow up so fast !!!! Talk about enough to make you go to your knees … GEEZ !!!! I’m extremely lucky because my two babies are such gentleman and so kind that I must have done something right 🙊.”

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The singer continued talking up her sons, while also explaining why she hasn’t posted any photos of them on social media recently.

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“I haven’t posted pictures of them for some time cause they’re at the age where they want to express their own identities and I totally get it …. But I went out of my way to make this cool edit 🌅 and guess what …. They’re finally letting me post it !!!” shared Spears. “Now I don’t feel left out anymore 😂😂😂 and I’m gonna go celebrate …. Oh shit I guess cool moms don’t do that … Ok I’ll just read a book instead 🤷🏼‍♀️📚🤣 !!!!”

This article originally appeared on Harper’s BAZAAR US.