Why does the singer in "You lie" stay with her husband/boyfriend?

She's in love - which is the lamest excuse ever.

If you're talking about the song "You Lie" by Reba McEntire I believe at the end of the video she blows up a boat with him and his lover in it.
But that might be another video.

Reba McEntire and Kelly Clarkson. It is a duet.

The song ends without a resolution. The video with the lover and the boat explosion is does he love you with linda davis. The duet with Kelly is Because of You and she sang does he love you with Kelly on AI