Last night's episode of "Keeping Up With the Kardashians" was full of drama as the Kardashian/Jenner girls (plus Tyga) finished up their summer vacation to St. Barth's, Kendall Jenner complained that her sister Kylie's relationship with rapper Tyga is interfering with their sisterly bonding time, and Scott Disick finally opened up to the Kardashian women for the first time since his breakup with Kourtney.

On the previous episode, the Kardashian girls (Kim, Kourtney and Khloé) and Kendall all complained that Kylie broke the rules of their summer trip when she invited her boyfriend Tyga along to what was supposed to be a girls-only trip. Kardashian/Jenner matriarch Kris Jenner revealed that she told Kylie to invite her new beau because it was the first time that the baby of the clan was able to bring along a date to a family trip. But Kylie and Tyga kept to themselves for most of the trip, which annoyed Kendall since she was looking forward to some quality one-on-one time with her younger sister. Kendall confronted Kylie about bringing Tyga, and the girls had a heart-to-heart before they settled the dispute.

"I have a lot of people to please, I have a lot of people to love me. I'm really wanted," Kylie told her Kendall. "I'm just kidding, but yeah, we should have sister time."

The relationship between Kylie and Tyga seemed to have progressed quickly, and Kris had a conversation with her daughter's new boyfriend during dinner when she noticed that he had tattooed Kylie's name on his arm. Kylie's sisters seemed to be shocked by the ink, but Kris said she was okay with it as long as Kylie didn't get a tattoo of Tyga's name.

Kim then changed the subject to their brother Rob Kardashian and the portrait tattoo he got of his now ex-girlfriend, pop star Rita Ora - which was a cover-up of a tattoo he got for his other ex, Adrienne Bailon. She threw shade at her little brother's choices when she said the tattoo now looks like a Cabbage Patch doll instead of a Barbie doll since he gained weight.

Kourtney tried her best to keep her mind off of her ex-boyfriend of nine years Scott Disick during their trip, but she kept receiving text message updates about what the father of her three children was up to in Mexico, where he partied with other girls. Khloé helped her sister take her mind off of her breakup by showing off her revenge body with a revealing photo shoot.

"Scott is just jumping about with these random chicks and Kourtney is way flyer than those girls will ever be," Khloé said.

But after the girls returned from their trip, Disick showed up at Kris' home, which they said was the first time they had seen him in the months since their split. Disick, who had long battled with alcohol addiction, had been on a drinking binge and he finally came clean to the Kardashian women about his problem. He apologized to all four women for "embarrassing" their family and letting them all down, and said that he now knows he needs help.

"I understand that I need to help myself way before I can help her [Kourtney] or my kids, but it's just been a really hard time," Disick said as he held back tears and Kourtney wiped her eyes.

"I've never been as unhappy in my life," Disick continued. "If I didn't have those kids, I would kill myself. But I have them, and I'm gonna be here and I'm gonna make it right for them."

Watch a clip from the E! Network's episode below.