No, we're not making this up.
2,000 moms were surveyed by the website WinMonkey.co.uk, which found almost a third of moms had been late as they were drinking with friends.
WinMonkey.co.uk spokesman Sam Notaro said: "Traffic is a factor that no one can control and school [pick-up] time is notoriously busy. But the fact that 19 percent of mums were late because they were having an affair is shocking."
Have you ever been late picking up your kids for school? Surely your excuse isn't as juicy as this! (Or is it?!)