Kourtney still upset with cheating Mom.

The Kris Jenner affair is front and center on Keeping Up with the Kardashians and Kourtney Kardashian openly questions her mom as a homewrecker.

Kris admits an affair in her new book and Kourtney can't understand why she would bring this all up now and talks it over with sister Kim Kardashian for an episode of the reality TV show.

Ryan Seacrest.Com notes that during the show, Kim tells the audience she believes Kourtney is still upset over her mom’s affair she detailed in her memoir, “Kris Jenner…And All Things Kardashian.”

“Kourtney could never understand now, having her own child, what it would be like to have an affair at this stage in her life as a mom,” Kim says.

Watch a video here.

In an earlier report, it was revealed that Kim is now being given fashion tips by new boyfriend Kanye West.

The 'Keeping Up With The Kardashians' star helped run a clothing boutique with her sisters Kourtney Kardashian and Khloe Kardashian as well as her mother Kris Jenner before finding fame, but Kanye thinks he can help.

He thinks Kim needs to be more adventurous with the image she puts out in the public eye.

A source said:

"Kanye says she plays it safe too much so has been trying to pick outfits for her to wear and encourage her to be more daring."

Check out photos of the Kardashians (including Scott, Kourtney and Mason) and some of Kim and Kanye is Europe below in the gallery.

(Images: WENN / FameFlynet)