Miranda Lambert: Blake Shelton Was Initially 'Off Limits' – But I Wanted Him
08/30/2011 AT 10:00 AM EDT
Miranda Lambert may be a lot of things – but she's not a homewrecker.
In a new interview with Hoda Kotb, which aired Monday night on Dateline, the country singer says she felt instant chemistry after meeting her now-husband Blake Shelton years ago while performing with him. Only, there was a slight problem.
"I knew he was married," Lambert, 27, said during Monday's interview. "I had seen their wedding picture in Country Weekly." (Shelton, 35, was married to Kaynette Williams from 2003-2006).
"I knew better," she continued, "like, this is off limits. My parents are private investigators for God's sake. I've seen this my whole life – affairs. Of all people to know better, I know better than this."
Nevertheless, the attraction between the two – who wed in May after dating since 2005 – was undeniable.
"I didn't know what to do with it," she said. "It was, like, my first duet with some other country star, and I didn't know if it was just initial butterflies because of that."
Continued Lambert: "I don't know what it was. It was just this draw to each other."
The couple resides in two homes in Tishomingo, Okla., with their dogs.