"Joe is younger than me. He's 38. He's never had kids," she said. "How am I going to say no? I tell him if we’re going to do this, we have to do it, like, now, because I don't want to be 50 with a baby."
Vergara's 23-year-old son, Manolo Gonzalez-Ripoll Vergara, just graduated from college this week, so it's been a long time since she's had a baby to look after.
"I finally realized that relationships don't need to be so much work," she said. "Ever since we met, it's been so easy. I'm very suspicious. I'm like, 'It's not normal that we've been together for nine months and we haven't had a big fight or anything.'"
Vergara-- who's currently in a legal battle with her ex-fiance Nick Loeb over frozen embryos -- also shared the big lesson she's learned about men since hitting her 40's.
"I have learned that I have to let them be men," she said. "I think it's very important not to try to take over on everything -- even if you think you can do it easier or better. If you don't let them do things, you create a cycle and then you complain that they never do anything."
In January, the Hot Pursuit star shared similar sentiments with ET about having kids with Manganiello. "It needs a lot of planning," she said. "But we have to leave it to God to see if it happens."