Opening up over oysters. Scott Disick joins Caitlyn Jenner and her friends on a road trip in I Am Cait's Sunday, April 3, episode, where he opens up about mistakes he made in his relationship with Kourtney Kardashian.

The E! series' preview clip shows Disick, 32, telling Jenny Boylan at a seafood restaurant that his July 2015 split from the Keeping Up With the Kardashians star has been painful for him.

"It's very tough," the self-proclaimed Lord admits. "I made a lot of decisions that weren't great."

Disick then turns his attention to Jenner, who is seated across the table. He wants to chat one-on-one, but the Olympian, 66, claims to have trouble hearing him, blaming her bad ears.

"Is it really your ears, or you just don't want to listen?" Disick fires back.

The entrepreneur has been quite forthcoming lately about the split from Kardashian, 36, with whom he shares children Mason, 6, Penelope, 3, and Reign, 15 months. Disick told Australian radio show Kyle & Jackie O on Tuesday, March 29, that he doesn't "really rule anything out" when it comes to possibly reconciling with his former paramour.

The two ended their nine-year relationship after Disick was spotted cozying up to his ex-girlfriend Chloe Bartoli while on vacation in the South of France last summer.

Watch Disick come clean in the video above.

I Am Cait airs on E! on Sundays at 9 p.m. E.T. 

Can't get enough of Us? Sign up now for the Us Weekly newsletter packed with the latest celeb news, hot pics and more!