No one knows how to calm a Housewife down better than Andy Cohen.

On Sunday’s Watch What Happens Live, the host welcomed Don’t Be Tardy star Kim Zolciak-Biermann into the clubhouse — and was forced to diffuse a potentially awkward situation when she called him out for not being invited to his baby shower last month.

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“You were not invited to my baby shower, that is true,” said Cohen, 50, who welcomed his first child, son Benjamin Allen Cohen, on Feb. 4 via surrogate.

“That’s weird, right?” said Zolciak-Biermann, 40.

“I will say that I texted you that day what I would consider to be a very nice text,” Cohen pointed out.

Zolciak-Biermann acknowledged the text and revealed that she probably wouldn’t have been able to attend anyway since she’d just had back surgery.

“But here is why you weren’t invited: Because it was all current Housewives who were invited and it was thrown by like, the five current Housewives,” Cohen explained of the Bravo-themed bash, which was hosted by the franchise’s remaining OG Housewives Kyle Richards, Vicki Gunvalson, Teresa Giudice, NeNe Leakes and Ramona Singer.

When Zolciak-Biermann began pulling faces at Cohen, he clarified that Leakes had brought former Atlanta Housewife Phaedra Parks as a surprise.

“I was going to say, that bitch is old as f—,” said Zolciak-Biermann, clarifying, “like, a couple years ago.”

“That was a surprise,” Cohen said. “But then that day I was thinking, ‘Man, it would have been so great if Kim was there.’ And that’s why I texted you. I said, ‘I just want you to know that I’m thinking of you and I wish that you were here.’ ”

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Cohen also revealed that Zolciak-Biermann (who left the Real Housewives of Atlanta in 2013 after five seasons) wasn’t the only former Housewife who wished they’d scored the invite: Real Housewives of New York City alum Jill Zarin had also reached out.

“The problem is that then — look, I would have loved [Real Housewives of New Jersey alum] Caroline Manzo to be there, too!” said Cohen.

“It’s a lot for you to deal with,” Zolciak-Biermann admitted. “And you’ve done such a great job with all of our crazy f—ing a–es throughout the years. You really have. Because it’s a lot of pressure. Like, you can’t go to my wedding and not go to NeNe’s. So it’s a balancing act for you and I have to give up to you because you do it tastefully. I do mean that.”

“Thank you,” Cohen said. “I appreciate that.”

Speaking to PEOPLE and Entertainment Weekly Editorial Director Jess Cagle in last week’s issue, Cohen opened up about how supportive the Bravo stars have been on his journey to fatherhood.

“The Housewives have given me a lot of advice,” Cohen said. “All their mom instincts came out. As loud and funny and aggressive and wild and dramatic and everything you want to say about the Housewives, as much of all that as they are, they’re all moms, pretty much. And they’re all good moms.”

“They all really surrounded me and just wanted to protect me and help me in the sweetest, most humane and lovely way that has just continued to really tickle me,” he added. “They’ve all been so lovely.”