Khloe Kardashian is trying to "change the energy" within her family.
Khloe explains in the clip above, "Obviously when Rob first told me about his relationship with Chyna…how I first found out it just wasn't on good terms. But I don't really know Chyna, I've never hung out with her one-on-one, I've never had her phone number, none of that and I want to change that."
She continues, "I want to change the energy within the family, I want to make everything just happy and that we're all just accepting of one another."
Since Khloe doesn't have her phone number, Kim Kardashian calls Chyna so Khloe can invite her to the party.
"I am having a birthday party and I wanted you to know, I know you and Rob are kinda like fighting or whatever and I wanted you to know that if he doesn't want to come, you are still invited to come," Khloe tells Chyna.
How does Chyna react?
Take a look at the video above to find out and then watch Keeping Up With the Kardashians to see if Chyna and Rob end up making it to Khloe's birthday party!
Keeping Up With the Kardashians returns Monday, Sept. 25 at 9PM, only on E! UK & EIRE