Oopsie! Kendra Wilkinson hit a tattoo parlor with sweet, maternal intentions but had a momentary lapse when she forgot her six-year-old son Hank Jr.'s birthday!

The star of Kendra on Top and wife of Hank Baskett recently went with some girlfriends to get inked for the first time with the infinity symbol and her two children's dates of birth (she's also mom to daughter Alijah, 23 months).

RELATED: Kendra Wilkinson Opens Up About the Aftermath of Hank Baskett's Affair

kendra and hank and two kids getty 2015

Kendra, Hank and their two children

But when the tattoo artist in Australia, where the 30-year-old former Playboy model is filming her latest project, asked for details, Kendra spaced — as seen on Friday night's episode of her show.

"I have two kids. And I do like dates — dates represent a lot for me," she tells the guy. "For instance, like 12… wait, when was my son's birthday?" she asks one of her friends.

She then proceeds to call Hank to confirm both kids' special days. Hilarious. (Let us help you, Kendra: Hank Jr. was born on December 11, 2009 and younger sis Alijah on May 16, 2014.)

Hmm. Maybe we can chalk the whole thing up to prolonged baby brain?