AceShowbiz -

Already a father to three adorable kids, Mason, 7, Penelope, 5, and Reign, 2, from his longtime relationship with Kourtney Kardashian, Scott Disick reportedly jokes about having more kids with current girlfriend Sofia Richie. The self-proclaimed Lord is said to "constantly" tease his much younger girlfriend about having babies with him.

It seems like Scott is having baby fever following the Kardashian-Jenner sisters' pregnancy boom. As revealed by an insider, "Seeing members of the Kardashian-Jenner clan getting pregnant, Scott jokes with Sofia all the time about what would happen if he ended up getting her pregnant -- even though he is in no rush to have children."

But Scott's pregnancy quips were purely jokes, noted the source to HollywoodLife.com. "He loves to see the reactions on her face and thinks they're priceless," the source explained, adding that the 34-year-old restaurateur is "a prankster in that way. But make no mistake, he's thoroughly enjoying the time he and her are spending together."

Previous report suggested that Scott apparently wouldn't get upset if his model girlfriend did end up pregnant with his child, though. "Scott is definitely not trying to get Sofia pregnant, but he wouldn't be against it if what they would call a mistake were to happen," a source told HollywoodLife.com. "They are definitely taking it day by day, and if it were to happen, he'd fully support the child."

Scott and the 19-year-old model reportedly have been getting serious and they've been spending a lot of time together, with them most recently enjoying their trip to Italy. "This is way more than what he's had with any of the other girls. Scott and Sofia have a real friendship," another insider said. "It's more than just physical attraction. They have a deep connection. He's even started saying that he could see himself settling down and marrying her."