What's the best way to get over a breakup with a long-term boyfriend? Party with your hot sisters.

That was exactly what Kourtney Kardashian did after separating from a nine-year relationship with Scott Disick, just a day after the separation. TMZ reports that after a session of body-tightening exercises, the "Keeping Up With the Kardashians" star wore a midriff-baring top during a girls' night out at Casa Escobar in Thousand Oaks just last Tuesday.

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Along with her sisters Kim and Khloe, the threesome wore a matching white ensemble, with Kim wearing a turtleneck and pencil skirt, while Khloe wore chic trousers. E! Online shares all their Instagram selfies together, showing the Kardashian clan thoroughly enjoying themselves as sisters. In one post, the single mother of three called her sisters "her two aces," saying that she is lucky to have two aces for her life.

Kourtney Kardashian just recently broke up with her boyfriend Scott Disick, who is also the father of her three children. The breakup was preceded by the uncontrollable partying that the perpetually tolerant Kourtney finally had enough of.

However,the breakup only means freedom from responsibility with Kourtney, and does not mean freedom from Disick's responsibility as a father. Hollywood Life reports that one of their daughters Penelope is turning three today. If Disick decides to stay silent even on his daughter's birthday, there will be consequences, like him never seeing his kids again. In fact, a custody battle is already underway.

In the world of Hollywood, it's always sad to see a couple break up, but there are some lines that should not be crossed. In the story of Scott Disick and Kourtney Kardashian, the supposed line that should not be crossed has been crossed repeatedly, and Kourtney has had enough. Fans of the couple however still hope that for the sake of his kids he shows up, and despite the angry girlfriend that he will have to face, shows remorse and actually apologize for whatever wrong he has done.

TagsKourtney Kardashian, Kim Kardashian, Khloe Kardashian, Keeping Up With The Kardashians, Scott Disick