The reality star is expecting her second child with Thomas Ravenel
Credit: Charles Sykes/Bravo

There’s a second baby on the way for Southern Charm‘s Kathryn Dennis!

The Bravo reality star is expecting a son with on- and off-again boyfriend Thomas Ravenel in December, she confirms to PEOPLE.

“I’m just excited about the baby,” she says. “And I’m happy [our daughter] Kensie will have a friend to play with. It’s nice that they will be so close in age.”

While this is the second child for Dennis and Ravenel, who welcomed daughter Kensington Calhoun on March 24, 2014, there has been no shortage of drama when it comes to the former couple’s tumultuous relationship.

“I was surprised,” Dennis says of finding out she was pregnant again. “Thomas and I are always on and off, but we had a whirlwind romance that weekend. That’s kind of how we were with the first pregnancy, too. Things were wishy-washy, but we embraced it.”

And as far as the current status of their relationship, “We are friends,” says Dennis. “We communicate and things are pleasant. “That’s all I can really hope for.”

Now as her due date nears, the 24-year-old is just enjoying her second pregnancy.

“It’s been much more mellow and a little more peaceful. I haven’t been sick or had any complications, which is good. I’ve been lucky.

And proud papa Ravenel, 53, couldn’t be more excited.

“The greatest gift thus far in my life has been the privilege of being a father to my daughter Kensie. Now, with a son on the way, I feel doubly blessed. ‘My cup runneth over.’ “