During last night's episode of E!'s "Keeping Up With the Kardashians," Kris Jenner had a pregnancy scare while Khloé Kardashian revealed that she's finally ready to move on from her estranged husband Lamar Odom and got into a blowout about him with mom Kris. Kendall Jenner and Khloé bonded with Kris' boyfriend Corey Gamble during a vacation to Mexico, and Kylie Jenner celebrated her 18th birthday with a club appearance in Canada.

Kris, 60, is on an estrogen cream regimen after going through menopause, which was documented at length in previous seasons. The hormones in the cream caused her menstrual cycle to start again, and she opened up to daughter Kourtney about her fear of the possibility of becoming pregnant again. Kourtney told Kris to call her doctor, which she did.

"Absolutely not," Kris' OB/GYN Dr. Paul Crane said over speakerphone. "No."

Khloé, the youngest Kardashian sister, is finally ready to move forward with the divorce from her estranged husband, former NBA star Lamar Odom, but her mother Kris isn't. Khloé blew up at her mom after Kris gave Odom Khloé's new phone number and accused Kris of being in "cahoots" with her soon-to-be ex-husband.

Khloé felt betrayed by her mother for speaking to Odom, especially after she took a stand against Kris' ex Caitlyn Jenner after the Vanity Fair cover story.

"That was my dad of 23 years, you crazy b---h," Khloé said over speakerphone. "You and I need a major break from each other."

Khloé's sister Kim Kardashian-West came to her defense as both daughters ganged up on Kris during an argument on speakerphone.

"She's ready to get over him and you need to let that happen," Kim told Kris.

Khloé decided that she needed a break from all the drama between her mom and her divorce, so she went on a Mexican getaway with little sister Kendall Jenner and Kris' boyfriend Gamble, and the trio visited a rescue foundation for lions, tigers and jaguars. Khloé had a close call in a den as lions and jaguars swarmed her and Kendall was so scared she cried.

"I'm freaking out. I'm on the verge of tears," Kendall said. "I think my sister is about to die!"

But Khloé made it out in one piece and the trip was a success. Meanwhile, Kylie, the baby of the Jenner sisters, prepared for her first-ever club appearance in Canada to celebrate her 18th birthday, and momager Kris was concerned because 18 is the legal drinking age in Canada.

Kylie handled her first of-age appearance like a pro and credited her mom for arming her with the tools to be able to handle herself in a rowdy, drunken club atmosphere.

"I appreciate my mom for being overprotective, but I feel like I have been raised well enough that I know how to handle situations like this," Kylie said.

Kim and Kourtney took on the task of planning the family's summer vacation to St. Bart's, but there's one catch - only the Kardashian/Jenner ladies and their children are invited. Kris agreed to attend without Gamble, and a clip from the next episode teased drama between Kylie and Kendall when Kylie breaks the rules and invites her boyfriend Tyga.

Watch a clip from the episode below: