Serena Williams proved she isn't above using Instagram to make fun of her older sister, Venus. Ah, 22-time Grand Slam champions, they're just like us.

Like the rest of the planet, Serena Williams saw Simone Biles and Aly Raisman get interviewed after picking up a slew of medals in Rio. By now, it's common knowledge that the very youthful USA gymnastic team members call 22-year-old Raisman “grandma,” so Serena Williams wants to know what that makes 36-year-old Venus Williams.

The younger Williams, at 34 years of age, even came up with some funny hashtags (#pettyrena).

Venus Williams still got the last laugh; she was competing in her fifth Olympic games, and walked away with a silver medal in mixed doubles, while Serena left empty handed.