Do we sense some sibling rivalry already in the Legend household? If you ask Chrissy Teigen, then yes! The soon-to-be mother-of-two took to her Twitter to joke about her daughter Luna’s potential hatred for her unborn baby brother. The model worries that her daughter will take after her and not be ready for this huge change.

“I’m scared Luna is gonna hate her baby brother because I have a really hard time welcoming new Bravo cast members,” she wrote to her followers. Fans quickly wrote back sharing their own stories of sibling rivalry. “I used to shake my baby brother’s crib and yell ‘go away baby’ but I’m sure she’ll love him,” one person said in response. Another added, “According to my mom when she brought my little brother home I slapped him and told her to take him back because he was crying and I didn’t want him anymore. I like to think neither of us were that traumatized.”

Well, it’s not clear how Luna will adjust to being a big sis, but Chrissy has talked about the bond she hopes to grow with her son. While on the Today show just last month, she gushed, “I’m so excited. Luna is such a daddy’s girl and they say that boys just love their mamas, so I’m already kind of thinking about how much I’m not going to like his girlfriends!”

Life & Style revealed back in October that Chrissy and John are expecting, and it was Chrissy’s mother, Vilailuck Teigen, who spilled the beans on the Lip Sync Battle set. “Chrissy’s mom was overheard saying, ‘My daughter is so emotional these days because she’s pregnant,'” a source said. It was also revealed that the couple was going through a rough patch in their marriage. “It should give them a huge reason to make the marriage work,” the source continued. Well, we can’t wait to meet the little guy!