"Because that way, also, we're helping a child that really, really needs [it]."
Ali, 34, and Kevin are already parents of daughter Molly, who was born in July 2016, and son Riley, whom the couple welcomed in May 2018.
"It's not like we have to get pregnant now because I'm pregnant for nine months and then we want the kids to be close in age, [so] we could do it later. And I think that'd be really special," Ali said of adopting.
"I like the idea of having a big family, but not being pregnant."
Ali and the 35-year-old radio host got married in 2017, one year after the pair started their family.
Two months after bringing Baby No. 2 in the world, Ali admitted to Us that she and Kevin were done having kids and there was "no chance in hell" they'd try for a third.
"We're talking about vasectomies. Like, we are done. I've done enough, okay? I've had children, I've been through pregnancy, labor. He can do something this time," Ali said at the time.
"Yeah, no. We're having those conversations. We don't want more than two. The thing is, a vasectomy is reversible... but, like, we're like certain we don't want one, even though I say, never say never."