"I mean it's been tough," Rob admits in the clip above. "It's really just…it takes either one person to man up, obviously that's gonna have to be me. But at the same time I'm not gonna argue with a female."
Rob then says he and Chyna "had a good talk the other night."
"I'm the one who said arguments are normal, it's gonna happen," Khloe tells Rob.
"OK but at that second it happened I took it seriously and I took it to heart," Rob tells his sisters.
"And that's because you're sensitive," Khloe says. "You have to worry about Rob and how you can be strong and better for you and now your baby."
Rob then tells his sisters that he's "fine" and says he wants to get his "s--t together."
"My plan is not to have a kid with somebody and not be with the person," Rob says. "That's just bizarre to me."
Khloe then explains, "I know Rob and Chyna have a long way to go but I'm really happy that they are working things out."
Take a look at the clip above to see what else Khloe says about Rob and Chyna's relationship!
Watch brand new episodes of Keeping Up With the Kardashians Sundays at 9PM in the UK & EIRE