Bill Clinton has repeatedly joked that he’s become so close to the Bushes that he’s considered their “black sheep son,” and on Wednesday he and adopted brother George W. Bush broadcast their affection on social media. Clinton tweeted a photo of himself reading W.’s book 41: A Portrait of My Father, and teased the younger Bush with the hashtag #HowAreYouSTILLNotOnTwitter, as he did on Presidents’ Day. This time, W. had a better response.

Bush posted a screenshot of Clinton’s tweet on Instagram with this caption:

Thanks, 42! Hope you like the book about your pal, #41. #HowAreYouSTILLNotOnInstagram #PresidentialGrammers #BrotherFromAnotherMother”

It’s all fun and games until someone’s family member is running for president.