The move is just one of the signs that Lachey and Minnillo may be getting serious. Minnillo also told the magazine last month she couldn't wait to be a mom.
"I want to bring three boys up to be good men in this world and then one little girl." she said. "I always say I want three boys and a girl but at the end of the day I just want healthy kids."
The TV personality calls Lachey "a nice guy."
"He's in the studio recording right now (in) L.A., Nashville, New York. All over, with something for everyone to look out for," Minnillo said.
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