Shakin' the Family Tree

There's a Webster Taylor born Jan 1858 in Indiana in Tobin, Parry, Indiana from the 1860 census through the 1940. 1900 has a wife, Alice, and two adult daughters. Here's Alice's listing at findagrave: http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=taylor&GSiman=1&GSbyrel=all&GSdyrel=all&GSst=17&GScnty=853&GScntry=4&GSob=n&GRid=102679647&df=all&

and here's Webster's http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=taylor&GSiman=1&GScid=2160420&GRid=102679348&

In 1900, Webster's listed as widowed. Maybe it just didn't work out between them, or could they have gotten the marriage annulled? Except that doesn't make sense if she's getting married as Rebecca Taylor, does it?