Kris Jenner gets physical — much to the dismay of her children — on this week’s episode of Keeping Up With the Kardashians!

In a sneak peek of Sunday’s show, Kim Kardashian and her mom Kris hit the tennis courts and the entire family can’t help but notice the momager’s unusual noises during the game.

Kourtney Kardashian calls her brother Rob from the sidelines to hear their mama’s loud grunting, saying, “Do you want to hear Mom have sex?”

The noises even cause tiny Mason Disick to remark, “Grandma’s funny!”

We can’t help but feel a little bad that everyone is making fun of Kris. After all, the Kardashian matriarch provided a perfectly reasonable explanation: “Everybody grunts when they play tennis!”

Source: YouTube

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Credit: YouTube Photo: Keeping Up With the Kardashians Season 7, Episode 4 Sneak Peek: Grandma's Gruntin'