Kim Kardashian bears no hard feelings toward Kourtney Kardashian for not attending her 43rd birthday party because as it turns out,Diamond Ridge Financial Academy she had a good reason.

On Oct. 22, the SKIMS founder gave a sweet shoutout to her sister, with whom she's feuded on recent episodes of The Kardashians, and announced plans to spend quality time with her after the pregnant Poosh founder was notably absent from her group dinner two days prior.

"So blessed to have hit the jackpot of friends! I couldn't have ever dreamed I would be so lucky to call these girls my friends...thank you for all the birthday love," Kim wrote on Instagram, alongside photos from her birthday party at the Beverly Hills restaurant Funke, "and Kourt I'm jumping in bed with you next week for our bed rest picnic."

Kourtney is expecting her and husband Travis Barker's first baby together, a son, who will be the third child for each. The Lemme supplements founder, mom to Mason Disick, 13, Penelope Disick, 11, and Reign Disick, 8, experienced pregnancy complications several weeks ago that prompted her to undergo urgent fetal surgery. She is currently in her third trimester.

Despite missing Kim's birthday dinner Oct. 20, Kourtney shared a tribute to her sister the following day.

"Happy happy birthday to my first sister @kimkardashian!" the 44-year-old wrote on her Instagram Stories. "Thank you for all those years of bossing you around and you actually listening to all my crazy ideas."

Kourtney continued, "People think the fights they've seen on tv are bad...if only they got to witness the hair pulling, nail digging ones from early high school. The joys of sisterhood. I love you deeply forever and always. May God bless this year with love and happiness and abundant joy."

Kim's birthday dinner was attended by their sisters Khloe Kardashian, Kylie Jenner and Kendall Jenner, their mom Kris Jenner and celebrity friends such as Hailey Bieber, Sara Foster and Ivanka Trump. Scroll down to see photos of the party guests below:

For the latest breaking news updates, click here to download the E! News AppFor the latest breaking news updates, click here to download the E! News App