Motherhood is not going to cool down the piping-hot messiness of Mistresses‘ Karen Kim.

ABC’s summer sudser has cast TV vet Jerry O’Connell (We Are Men) as the manny for Yunjin Kim’s beautifully disastrous doctor, TVLine has learned exclusively.

While O’Connell’s character Robert — who moonlights as an actor — will initially be in charge of changing diapers and locating lost binkies, we hear there’s a possibility that inappropriate love (aka the only kind we really want to see on Mistresses) could eventually follow.

O’Connell’s guest-starring arc — which we hear will result in some hilarious moments — is slated to last at least four episodes, but the actor will also be back direct some installments later in the season.

No word on whether O’Connell’s introduction means that Karen’s romance with baby daddy Alec (Ed Quinn) — last seen mourning the death of his wife (and Karen’s “thruple” participant) Vivian — is kaput.

Are you hoping Karen will violate the employer-employee relationship? Does O’Connell seem like a good fit for the Mistresses universe? Sound off below!