She and her husband are separated.
Cindy Sheehan has done a complete turnaround from her previous position after getting involved with radical, anti-Bush political activities. In an interview with an apparent leftist named "DarkSyde" (August 1, 2005 on UTI), Cindy Sheehan noted that "[m]y husband and I are separated, because he doesn't support my activities..."
And west coast Freepers had reported a couple days ago that that a local station said she's estranged from her remaining 3 children.