In fact, the last time we saw them together was at Jamie Lynn's wedding in March and since that was Jamie Lynn's day, we didn't see many photos of them actually together.
We don't know if this was coincidence or if it had something to do with Britney's recent relationship news, but the sister's hung out this week and they brought their kiddos along with them.
Jamie Lynn's daughter (Maddie) and Britney's two sons (Sean and Jayden) all posed for this adorable mini-reunion photo and the fun didn't stop there.
After the crew watched Jamie Lynn perform, they all jumped on a private jet together and headed - who knows where! Maybe back to Las Vegas to see Britney's show? Although Jamie Lynn's show is much more kid-friendly than Britney's, so who knows.
Either way, we're glad this little reunion happened when it did because if Britney ever needed support, it's now and we're sure she's super grateful to have her sis by her side during this especially tough time.
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Gallery | Our Favorite Celebrity Siblings