Jennifer Garner and Conan O'Brien Credit: TBS

Jennifer Garner admits there was a time she questioned her decision to have another kid with Ben Affleck.

"We wanted a third and we had a third, and I wouldn't trade him for anything," Garner told Conan O'Brien of son Samuel, whom she welcomed in February, during an October 3 appearance on TBS' Conan. (Samuel joined older sisters Violet, 6, and Seraphina, 3). "But, you know how two feels like six? Three just put me right over the edge."

After Samuel's birth, "I was going up to anyone on the street saying, Would you please come work at my house?" Garner joked. "Would you please come help me? Just take a child. Do something."

Although she said she's since adjusted to having three little ones to look after, the Butter actress, 40, has also revealed that she's adamant about not adding any more to her and Affleck's brood.

The Argo star, also 40, wants another but "I plan to be done," Garner told Ellen DeGeneres last month.

Garner said it'd be hard to top her new bundle of joy, anyway. "[Samuel] is so chill . . . He reaches when he sees me and he laughs a lot," Garner explained. "He thinks I'm super funny. What more do you want?"