Trick or treat...And goodnight!

A photo posted by Kourtney Kardashian (@kourtneykardash) on Oct 10, 2014 at 9:13pm PDT

Kitty Kourt! Kourtney Kardashian wore a form-fitting black cat outfit for Halloween, Oct. 31, that accentuated her large baby bump. The mother of two posted a photo on Instagram late Friday evening, after trick-or-treating with her kids Mason and Penelope.

"Trick or treat… And goodnight!" the eldest Kardashian, 35, wrote alongside a snap from their Halloween outing. The reality star appeared to be the fiercest feline on the block in a super tight, sheer black top and a luxurious black fur coat. Kardashian sported big cat ears atop her brunette tresses, festive whiskers, a heart-shaped nose, gothic black lipstick, and matching nails. She also added an element of shine to her ensemble with La Soula Jewelry's "Feel it in your Bones Diamond Necklace."

Her children, meanwhile, matched their mom in black-color costumes, but entirely different concepts. Mason, 4, dressed as Darth Vader from Star Wars, while his little sister Penelope, 2, dressed identically to her cousin North West, 16 months, in a matching skunk costume.

Us Weekly caught up with Kourtney this past week, and discussed the challenges of her third pregnancy. "I feel good," she told Us, explaining that there has been some fatigue. "Any little thing takes a toll on me" she admitted. "I went to Disneyland for 10 hours… I usually go for at least 12, but that took like, two days [to recover]."

Still, Scott Disick's longtime love told Us that she loves being a mom — pregnancy included. "I feel tired but in general, I do love being pregnant and always feel pretty good," Kourtney told Us. "I'm lucky. I always hear, like, horror stories."

Us broke the news in June that Kardashian was expecting baby No. 3 with Disick, and later confirmed the two are expecting a girl.